diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..6b482e0
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,27 @@
+name: ci
+
+on:
+  push:
+    paths-ignore:
+      - "doc/**"
+      - "**.rst"
+  pull_request:
+
+jobs:
+  ci:
+    runs-on: ubuntu-latest
+    container:
+      image: shiguredo/erlang:otp-26.0-rc3-openssl-3.1.0-ubuntu-22.04-x86_64
+    env:
+      ERL_FLAGS: -enable-feature maybe_expr
+    steps:
+      - uses: actions/checkout@v3
+      - run: make
+      - name: Slack Notification
+        if: failure()
+        uses: rtCamp/action-slack-notify@v2
+        env:
+          SLACK_CHANNEL: ${{ secrets.SLACK_INTERNAL_CHANNEL }}
+          SLACK_COLOR: danger
+          SLACK_TITLE: Failure test
+          SLACK_WEBHOOK: ${{ secrets.SLACK_WEBHOOK }}
diff --git a/.github/workflows/make-github.yml b/.github/workflows/make-github.yml
deleted file mode 100644
index c07ff51..0000000
--- a/.github/workflows/make-github.yml
+++ /dev/null
@@ -1,17 +0,0 @@
-name: make-github-workflow
-
-on:
-  push:
-    paths-ignore:
-    - 'doc/**'
-    - '**.rst'
-  pull_request:
-
-jobs:
-  make-github:
-    runs-on: ubuntu-latest
-    container:
-      image: shiguredo/erlang:otp-24.1.4-ubuntu-20.04
-    steps:
-      - uses: actions/checkout@v2
-      - run: make
diff --git a/CHANGES.md b/CHANGES.md
index 034270f..e97b631 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -2,6 +2,25 @@
 
 ## develop
 
+## 2023.1.0
+
+日付: 2023-05-02
+
+- [ADD] hex_efmt と hex_elvis を追加する
+  - @voluntas
+- [CHANGE] efmt を適用する
+  - @voluntas
+- [CHANGE] rebar3 の minimum_otp_vsn を 26.0 にする
+  - @voluntas
+- [UPDATE] GitHub Actions の docker の OTP を 26.0-rc3 に上げる
+  - @voluntas
+- [ADD] slack 通知を secrets.SLACK_INTERNAL_CHANNEL に変更
+  - @voluntas
+- [ADD] rebar3 3.20.0 を追加する
+  - @voluntas
+- [ADD] elvis.config を追加する
+  - @voluntas
+
 ## 2021.3.0
 
 - [CHANGE] applicaiton を base32 に戻す
@@ -11,31 +30,31 @@
 
 - [ADD] rebar3 hex plugin を追加する
 - [ADD] rebar3 3.17.0 を追加する
-    - @voluntas
+  - @voluntas
 - [CHANGE] 最小 OTP を 24.1 に上げる
-    - @voluntas
+  - @voluntas
 
 ## 2021.1
 
 - [FIX] `base32:decode(clockwork, _)` が Crockford になっていた問題を修正する
-    - @shino
+  - @shino
 - [CHANGE] `base32:decode(crockford, _)` が Binary を返していたため `{ok, Binary}` に変更する
-    - @shino
+  - @shino
 
 ## 2020.2
 
 - [CHANGE] Clockwork Base32 を実装する
-    - @szktty
+  - @szktty
 
 ## 2020.1.2
 
 - [FIX] Crockford's Base32: エンコード後の文字列の先頭が "0" であるべき場合に "0" が抜け落ちる事象を修正する
-    - @szktty
+  - @szktty
 
 ## 2020.1.1
 
 - [UPDATE] Crockford 版を数値計算で再実装
-    - @szktty
+  - @szktty
 
 ## 2020.1
 
@@ -46,7 +65,7 @@
 ## 1.1.0
 
 - [ADD] crockford の decode を追加
-    - @szktty
+  - @szktty
 
 ## 1.0.0
 
diff --git a/Makefile b/Makefile
index a1d9ee9..33e6438 100644
--- a/Makefile
+++ b/Makefile
@@ -3,7 +3,7 @@
 all: clean upgrade compile test dialyzer
 
 upgrade:
-	@./rebar3 do update, upgrade
+	@./rebar3 do update, upgrade --all
 
 compile:
 	@./rebar3 xref
diff --git a/README.md b/README.md
index 67cc4bc..40408ad 100644
--- a/README.md
+++ b/README.md
@@ -24,7 +24,13 @@ $ rebar3 shell
 <<"AXQQEB10D5T20WK5C5P6RY90EXQQ4TVK44">>
 ```
 
-エンコード方式の種類:
+## rebar3 deps
+
+```erlang
+{deps, [{base32, "2023.1.0", {pkg, base32_clockwork}}]}.
+```
+
+## エンコード方式の種類
 
 - `rfc4648`: RFC 4648
 - `crockford`: Crockford's Base32
@@ -34,8 +40,8 @@ $ rebar3 shell
 ## ライセンス
 
 ```
-Copyright 2020, SUZUKI Tetsuya (Original Author)
-Copyright 2020, Shiguredo Inc.
+Copyright 2021-2023, Shiguredo Inc.
+Copyright 2021, SUZUKI Tetsuya (Original Author)
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
diff --git a/elvis.config b/elvis.config
new file mode 100644
index 0000000..df3e4d1
--- /dev/null
+++ b/elvis.config
@@ -0,0 +1,47 @@
+[
+ {
+   elvis,
+   [
+    {config,
+     [#{dirs => ["src"],
+        filter => "*.erl",
+        ruleset => erl_files,
+        rules => [{elvis_text_style, line_length, #{limit => 120, skip_comments => whole_line}},
+                  %% Ranch 利用のため Transport:send/2 的なのが必要なので ...
+                  {elvis_style, invalid_dynamic_call, disable},
+                  %% snake_case じゃない場合は本来 '' で囲うべき
+                  {elvis_style, atom_naming_convention, #{regex => "^([a-z][a-zA-Z0-9_]*_?)*(_SUITE)?$", enclosed_atoms => ".*"}},
+                  {elvis_style, module_naming_convention, #{regex => "^([a-z][a-z0-9]*)(_[a-z0-9]+)*(_SUITE)?$"}},
+                  {elvis_style, variable_naming_convention, #{regex => "^(_?[A-Z][0-9a-zA-Z_]*)$"}},
+
+                  {elvis_style, nesting_level, disable},
+                  {elvis_style, god_modules, disable},
+                  {elvis_style, state_record_and_type, disable},
+                  {elvis_style, no_block_expressions, disable},
+                  {elvis_style, export_used_types, disable},
+                  {elvis_style, private_data_types, disable},
+                  %% 要検討
+                  {elvis_style, no_single_clause_case, disable},
+                  %% 要検討
+                  {elvis_style, max_function_arity, disable},
+                  %% 要検討
+                  {elvis_style, operator_spaces, disable},
+                  %% 要検討
+                  {elvis_style, no_spec_with_records, disable},
+                  %% 要検討
+                  {elvis_style, dont_repeat_yourself, disable}]
+       },
+      #{dirs => ["."],
+        filter => "rebar.config",
+        ruleset => rebar_config,
+        rules => [{elvis_project, protocol_for_deps}]
+       },
+      #{dirs => ["."],
+        filter => "elvis.config",
+        ruleset => elvis_config
+       }
+     ]
+    }
+   ]
+ }
+].
diff --git a/rebar.config b/rebar.config
index 327bc0e..20fee96 100644
--- a/rebar.config
+++ b/rebar.config
@@ -1,16 +1,36 @@
-{minimum_otp_vsn, "24.1"}.
+{minimum_otp_vsn, "26.0"}.
 
 {erl_opts, [{i, "src"},
             warnings_as_errors,
             warn_export_all,
             warn_unused_import]}.
 
-{xref_checks, [undefined_function_calls, undefined_functions,
+{xref_checks, [undefined_function_calls,
+               undefined_functions,
                locals_not_used,
-               deprecated_function_calls, deprecated_functions]}.
+               deprecated_function_calls,
+               deprecated_functions]}.
+
+%% https://rebar3.org/docs/configuration/configuration/#dialyzer
+{dialyzer, [{warnings, [extra_return,
+                        missing_return,
+                        no_unknown
+                        %% overspecs
+                        %% underspecs,
+                        %% specdiffs
+                        %% error_handling
+                       ]},
+            incremental,
+            {plt_apps, top_level_deps},
+            %% {plt_apps, all_apps},
+            {plt_location, local},
+            {base_plt_location, global}]}.
 
 {cover_enabled, true}.
 
 {validate_app_modules, true}.
 
+{project_plugins, [rebar3_efmt, rebar3_lint]}.
+{elvis_output_format, colors}.
+
 {plugins, [rebar3_hex]}.
diff --git a/rebar3 b/rebar3
index d5f99c6..3e09582 100755
Binary files a/rebar3 and b/rebar3 differ
diff --git a/src/base32.app.src b/src/base32.app.src
index bb7f7f6..c7a3d07 100644
--- a/src/base32.app.src
+++ b/src/base32.app.src
@@ -1,15 +1,12 @@
 {application, base32,
  [{description, "Clockwork Base32"},
   {pkg_name, base32_clockwork},
-  {vsn, "2021.3.0"},
+  {vsn, "2023.1.0"},
   {registered, []},
   {applications,
-   [
-    kernel,
-    stdlib
-   ]},
-  {env,[]},
+   [kernel,
+    stdlib]},
+  {env, []},
   {modules, []},
-  {licenses, ["Apache License, Version 2.0"]},
-  {links, [{"GitHub", "https://github.com/shiguredo/base32_clockwork"}]}
- ]}.
+  {licenses, ["Apache-2.0"]},
+  {links, [{"GitHub", "https://github.com/shiguredo/base32_clockwork"}]}]}.
diff --git a/src/base32.erl b/src/base32.erl
index 0d21fd6..4aa81bd 100644
--- a/src/base32.erl
+++ b/src/base32.erl
@@ -4,6 +4,7 @@
 
 -type base32_format() :: rfc4648 | crockford | crockford_check | clockwork.
 
+
 -spec encode(base32_format(), binary()) -> binary().
 encode(rfc4648, Data) ->
     base32_rfc4648:encode(Data);
@@ -14,8 +15,9 @@ encode(crockford_check, Data) ->
 encode(clockwork, Data) ->
     base32_clockwork:encode(Data).
 
+
 -spec decode(base32_format(), binary()) ->
-    {ok, binary()} | {error, atom()}.
+          {ok, binary()} | {error, atom()}.
 decode(rfc4648, Data) ->
     base32_rfc4648:decode(Data);
 decode(crockford, Data) ->
@@ -24,4 +26,3 @@ decode(crockford_check, Data) ->
     base32_crockford:decode_check(Data);
 decode(clockwork, Data) ->
     base32_clockwork:decode(Data).
-
diff --git a/src/base32_clockwork.erl b/src/base32_clockwork.erl
index a98a6d5..a48c1e1 100644
--- a/src/base32_clockwork.erl
+++ b/src/base32_clockwork.erl
@@ -4,22 +4,25 @@
 
 -import(base32_utils, [rev_bits_list_to_binary/1, bits_list_size/1]).
 
+
 -spec encode(binary()) -> binary().
 encode(Data) ->
     encode0(Data, []).
 
+
 encode0(<<>>, Accu) ->
     list_to_binary(lists:reverse(Accu));
 encode0(<<Bits:5, Next/bitstring>>, Accu) ->
-    encode0(Next, [symbol(Bits)|Accu]);
+    encode0(Next, [symbol(Bits) | Accu]);
 encode0(<<Bits:4, Next/bitstring>>, Accu) ->
-    encode0(Next, [symbol(Bits bsl 1)|Accu]);
+    encode0(Next, [symbol(Bits bsl 1) | Accu]);
 encode0(<<Bits:3, Next/bitstring>>, Accu) ->
-    encode0(Next, [symbol(Bits bsl 2)|Accu]);
+    encode0(Next, [symbol(Bits bsl 2) | Accu]);
 encode0(<<Bits:2, Next/bitstring>>, Accu) ->
-    encode0(Next, [symbol(Bits bsl 3)|Accu]);
+    encode0(Next, [symbol(Bits bsl 3) | Accu]);
 encode0(<<Bits:1, Next/bitstring>>, Accu) ->
-    encode0(Next, [symbol(Bits bsl 4)|Accu]).
+    encode0(Next, [symbol(Bits bsl 4) | Accu]).
+
 
 symbol(0) -> $0;
 symbol(1) -> $1;
@@ -54,13 +57,15 @@ symbol(29) -> $X;
 symbol(30) -> $Y;
 symbol(31) -> $Z.
 
+
 -spec decode(binary()) -> {ok, binary()} | {error, atom()}.
 decode(Data) ->
     decode0(Data, []).
 
+
 decode0(<<>>, []) ->
     {ok, <<>>};
-decode0(<<>>, Accu=[Last|Prev]) ->
+decode0(<<>>, Accu = [Last | Prev]) ->
     Size = bits_list_size(Accu),
     Last1 = case Size rem 8 of
                 0 ->
@@ -70,129 +75,128 @@ decode0(<<>>, Accu=[Last|Prev]) ->
                     <<Last2:BodySize/bitstring, _/bitstring>> = Last,
                     Last2
             end,
-    {ok, rev_bits_list_to_binary([Last1|Prev])};
+    {ok, rev_bits_list_to_binary([Last1 | Prev])};
 decode0(<<_:8>>, []) ->
     {error, invalid_size};
 decode0(<<"0", Next/binary>>, Accu) ->
-    decode0(Next, [<<0:5>>|Accu]);
+    decode0(Next, [<<0:5>> | Accu]);
 decode0(<<"O", Next/binary>>, Accu) ->
-    decode0(Next, [<<0:5>>|Accu]);
+    decode0(Next, [<<0:5>> | Accu]);
 decode0(<<"o", Next/binary>>, Accu) ->
-    decode0(Next, [<<0:5>>|Accu]);
+    decode0(Next, [<<0:5>> | Accu]);
 decode0(<<"1", Next/binary>>, Accu) ->
-    decode0(Next, [<<1:5>>|Accu]);
+    decode0(Next, [<<1:5>> | Accu]);
 decode0(<<"I", Next/binary>>, Accu) ->
-    decode0(Next, [<<1:5>>|Accu]);
+    decode0(Next, [<<1:5>> | Accu]);
 decode0(<<"i", Next/binary>>, Accu) ->
-    decode0(Next, [<<1:5>>|Accu]);
+    decode0(Next, [<<1:5>> | Accu]);
 decode0(<<"L", Next/binary>>, Accu) ->
-    decode0(Next, [<<1:5>>|Accu]);
+    decode0(Next, [<<1:5>> | Accu]);
 decode0(<<"l", Next/binary>>, Accu) ->
-    decode0(Next, [<<1:5>>|Accu]);
+    decode0(Next, [<<1:5>> | Accu]);
 decode0(<<"2", Next/binary>>, Accu) ->
-    decode0(Next, [<<2:5>>|Accu]);
+    decode0(Next, [<<2:5>> | Accu]);
 decode0(<<"3", Next/binary>>, Accu) ->
-    decode0(Next, [<<3:5>>|Accu]);
+    decode0(Next, [<<3:5>> | Accu]);
 decode0(<<"4", Next/binary>>, Accu) ->
-    decode0(Next, [<<4:5>>|Accu]);
+    decode0(Next, [<<4:5>> | Accu]);
 decode0(<<"5", Next/binary>>, Accu) ->
-    decode0(Next, [<<5:5>>|Accu]);
+    decode0(Next, [<<5:5>> | Accu]);
 decode0(<<"6", Next/binary>>, Accu) ->
-    decode0(Next, [<<6:5>>|Accu]);
+    decode0(Next, [<<6:5>> | Accu]);
 decode0(<<"7", Next/binary>>, Accu) ->
-    decode0(Next, [<<7:5>>|Accu]);
+    decode0(Next, [<<7:5>> | Accu]);
 decode0(<<"8", Next/binary>>, Accu) ->
-    decode0(Next, [<<8:5>>|Accu]);
+    decode0(Next, [<<8:5>> | Accu]);
 decode0(<<"9", Next/binary>>, Accu) ->
-    decode0(Next, [<<9:5>>|Accu]);
+    decode0(Next, [<<9:5>> | Accu]);
 decode0(<<"A", Next/binary>>, Accu) ->
-    decode0(Next, [<<10:5>>|Accu]);
+    decode0(Next, [<<10:5>> | Accu]);
 decode0(<<"a", Next/binary>>, Accu) ->
-    decode0(Next, [<<10:5>>|Accu]);
+    decode0(Next, [<<10:5>> | Accu]);
 decode0(<<"B", Next/binary>>, Accu) ->
-    decode0(Next, [<<11:5>>|Accu]);
+    decode0(Next, [<<11:5>> | Accu]);
 decode0(<<"b", Next/binary>>, Accu) ->
-    decode0(Next, [<<11:5>>|Accu]);
+    decode0(Next, [<<11:5>> | Accu]);
 decode0(<<"C", Next/binary>>, Accu) ->
-    decode0(Next, [<<12:5>>|Accu]);
+    decode0(Next, [<<12:5>> | Accu]);
 decode0(<<"c", Next/binary>>, Accu) ->
-    decode0(Next, [<<12:5>>|Accu]);
+    decode0(Next, [<<12:5>> | Accu]);
 decode0(<<"D", Next/binary>>, Accu) ->
-    decode0(Next, [<<13:5>>|Accu]);
+    decode0(Next, [<<13:5>> | Accu]);
 decode0(<<"d", Next/binary>>, Accu) ->
-    decode0(Next, [<<13:5>>|Accu]);
+    decode0(Next, [<<13:5>> | Accu]);
 decode0(<<"E", Next/binary>>, Accu) ->
-    decode0(Next, [<<14:5>>|Accu]);
+    decode0(Next, [<<14:5>> | Accu]);
 decode0(<<"e", Next/binary>>, Accu) ->
-    decode0(Next, [<<14:5>>|Accu]);
+    decode0(Next, [<<14:5>> | Accu]);
 decode0(<<"F", Next/binary>>, Accu) ->
-    decode0(Next, [<<15:5>>|Accu]);
+    decode0(Next, [<<15:5>> | Accu]);
 decode0(<<"f", Next/binary>>, Accu) ->
-    decode0(Next, [<<15:5>>|Accu]);
+    decode0(Next, [<<15:5>> | Accu]);
 decode0(<<"G", Next/binary>>, Accu) ->
-    decode0(Next, [<<16:5>>|Accu]);
+    decode0(Next, [<<16:5>> | Accu]);
 decode0(<<"g", Next/binary>>, Accu) ->
-    decode0(Next, [<<16:5>>|Accu]);
+    decode0(Next, [<<16:5>> | Accu]);
 decode0(<<"H", Next/binary>>, Accu) ->
-    decode0(Next, [<<17:5>>|Accu]);
+    decode0(Next, [<<17:5>> | Accu]);
 decode0(<<"h", Next/binary>>, Accu) ->
-    decode0(Next, [<<17:5>>|Accu]);
+    decode0(Next, [<<17:5>> | Accu]);
 decode0(<<"J", Next/binary>>, Accu) ->
-    decode0(Next, [<<18:5>>|Accu]);
+    decode0(Next, [<<18:5>> | Accu]);
 decode0(<<"j", Next/binary>>, Accu) ->
-    decode0(Next, [<<18:5>>|Accu]);
+    decode0(Next, [<<18:5>> | Accu]);
 decode0(<<"K", Next/binary>>, Accu) ->
-    decode0(Next, [<<19:5>>|Accu]);
+    decode0(Next, [<<19:5>> | Accu]);
 decode0(<<"k", Next/binary>>, Accu) ->
-    decode0(Next, [<<19:5>>|Accu]);
+    decode0(Next, [<<19:5>> | Accu]);
 decode0(<<"M", Next/binary>>, Accu) ->
-    decode0(Next, [<<20:5>>|Accu]);
+    decode0(Next, [<<20:5>> | Accu]);
 decode0(<<"m", Next/binary>>, Accu) ->
-    decode0(Next, [<<20:5>>|Accu]);
+    decode0(Next, [<<20:5>> | Accu]);
 decode0(<<"N", Next/binary>>, Accu) ->
-    decode0(Next, [<<21:5>>|Accu]);
+    decode0(Next, [<<21:5>> | Accu]);
 decode0(<<"n", Next/binary>>, Accu) ->
-    decode0(Next, [<<21:5>>|Accu]);
+    decode0(Next, [<<21:5>> | Accu]);
 decode0(<<"P", Next/binary>>, Accu) ->
-    decode0(Next, [<<22:5>>|Accu]);
+    decode0(Next, [<<22:5>> | Accu]);
 decode0(<<"p", Next/binary>>, Accu) ->
-    decode0(Next, [<<22:5>>|Accu]);
+    decode0(Next, [<<22:5>> | Accu]);
 decode0(<<"Q", Next/binary>>, Accu) ->
-    decode0(Next, [<<23:5>>|Accu]);
+    decode0(Next, [<<23:5>> | Accu]);
 decode0(<<"q", Next/binary>>, Accu) ->
-    decode0(Next, [<<23:5>>|Accu]);
+    decode0(Next, [<<23:5>> | Accu]);
 decode0(<<"R", Next/binary>>, Accu) ->
-    decode0(Next, [<<24:5>>|Accu]);
+    decode0(Next, [<<24:5>> | Accu]);
 decode0(<<"r", Next/binary>>, Accu) ->
-    decode0(Next, [<<24:5>>|Accu]);
+    decode0(Next, [<<24:5>> | Accu]);
 decode0(<<"S", Next/binary>>, Accu) ->
-    decode0(Next, [<<25:5>>|Accu]);
+    decode0(Next, [<<25:5>> | Accu]);
 decode0(<<"s", Next/binary>>, Accu) ->
-    decode0(Next, [<<25:5>>|Accu]);
+    decode0(Next, [<<25:5>> | Accu]);
 decode0(<<"T", Next/binary>>, Accu) ->
-    decode0(Next, [<<26:5>>|Accu]);
+    decode0(Next, [<<26:5>> | Accu]);
 decode0(<<"t", Next/binary>>, Accu) ->
-    decode0(Next, [<<26:5>>|Accu]);
+    decode0(Next, [<<26:5>> | Accu]);
 decode0(<<"V", Next/binary>>, Accu) ->
-    decode0(Next, [<<27:5>>|Accu]);
+    decode0(Next, [<<27:5>> | Accu]);
 decode0(<<"v", Next/binary>>, Accu) ->
-    decode0(Next, [<<27:5>>|Accu]);
+    decode0(Next, [<<27:5>> | Accu]);
 decode0(<<"W", Next/binary>>, Accu) ->
-    decode0(Next, [<<28:5>>|Accu]);
+    decode0(Next, [<<28:5>> | Accu]);
 decode0(<<"w", Next/binary>>, Accu) ->
-    decode0(Next, [<<28:5>>|Accu]);
+    decode0(Next, [<<28:5>> | Accu]);
 decode0(<<"X", Next/binary>>, Accu) ->
-    decode0(Next, [<<29:5>>|Accu]);
+    decode0(Next, [<<29:5>> | Accu]);
 decode0(<<"x", Next/binary>>, Accu) ->
-    decode0(Next, [<<29:5>>|Accu]);
+    decode0(Next, [<<29:5>> | Accu]);
 decode0(<<"Y", Next/binary>>, Accu) ->
-    decode0(Next, [<<30:5>>|Accu]);
+    decode0(Next, [<<30:5>> | Accu]);
 decode0(<<"y", Next/binary>>, Accu) ->
-    decode0(Next, [<<30:5>>|Accu]);
+    decode0(Next, [<<30:5>> | Accu]);
 decode0(<<"Z", Next/binary>>, Accu) ->
-    decode0(Next, [<<31:5>>|Accu]);
+    decode0(Next, [<<31:5>> | Accu]);
 decode0(<<"z", Next/binary>>, Accu) ->
-    decode0(Next, [<<31:5>>|Accu]);
+    decode0(Next, [<<31:5>> | Accu]);
 decode0(_, _) ->
     {error, invalid_format}.
-
diff --git a/src/base32_crockford.erl b/src/base32_crockford.erl
index 2a37e61..edde797 100644
--- a/src/base32_crockford.erl
+++ b/src/base32_crockford.erl
@@ -4,9 +4,11 @@
 
 -import(base32_utils, [rev_bits_list_to_binary/1]).
 
+
 data_to_integer(Data, Padding) ->
     data_to_integer0(Data, Padding, 0).
 
+
 data_to_integer0(<<>>, _, N) ->
     N;
 data_to_integer0(<<Bits:1>>, true, N) ->
@@ -28,11 +30,13 @@ data_to_integer0(<<Bits:4>>, false, N) ->
 data_to_integer0(<<Bits:5, Next/bitstring>>, Padding, N) ->
     data_to_integer0(Next, Padding, (N bsl 5) bor Bits).
 
+
 -spec encode(binary() | integer()) -> binary().
 encode(Value) ->
     Encoded = encode0(Value, []),
     list_to_binary(Encoded).
 
+
 -spec encode_check(binary()) -> binary().
 encode_check(Data) when is_binary(Data) ->
     Check = check_symbol(data_to_integer(Data, false)),
@@ -43,6 +47,7 @@ encode_check(Value) ->
     Encoded = encode0(Value, [Check]),
     list_to_binary(Encoded).
 
+
 encode0(Data, Accu) when is_binary(Data) ->
     Size = size(Data) * 8,
     BaseCount = Size div 5,
@@ -59,16 +64,19 @@ encode0(Value, Accu) ->
             end,
     encode1(Value, Count, Accu).
 
+
 encode1(_, 0, Accu) ->
     Accu;
 encode1(Value, Count, Accu) ->
     Next = Value div 32,
     SymVal = Value rem 32,
-    encode1(Next, Count - 1, [symbol(SymVal)|Accu]).
+    encode1(Next, Count - 1, [symbol(SymVal) | Accu]).
+
 
 check_symbol(Value) ->
     symbol(Value rem 37).
 
+
 symbol(0) -> $0;
 symbol(1) -> $1;
 symbol(2) -> $2;
@@ -107,10 +115,12 @@ symbol(34) -> $$;
 symbol(35) -> $=;
 symbol(36) -> $U.
 
+
 -spec decode(binary()) -> binary().
 decode(Data) when is_binary(Data) ->
     decode0(Data, []).
 
+
 -spec decode_check(binary()) -> {ok, binary()} | {error, atom()}.
 decode_check(Data) ->
     Size = (size(Data) - 1) * 8,
@@ -122,6 +132,7 @@ decode_check(Data) ->
         false -> {error, invalid}
     end.
 
+
 decode0(<<>>, Accu) ->
     Decoded0 = rev_bits_list_to_binary(Accu),
     DecodedSize = bit_size(Decoded0),
@@ -134,125 +145,124 @@ decode0(<<>>, Accu) ->
             Decoded1
     end;
 decode0(<<"0", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<0:5>>|Accu]);
+    decode0(Next, [<<0:5>> | Accu]);
 decode0(<<"O", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<0:5>>|Accu]);
+    decode0(Next, [<<0:5>> | Accu]);
 decode0(<<"o", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<0:5>>|Accu]);
+    decode0(Next, [<<0:5>> | Accu]);
 decode0(<<"1", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<1:5>>|Accu]);
+    decode0(Next, [<<1:5>> | Accu]);
 decode0(<<"I", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<1:5>>|Accu]);
+    decode0(Next, [<<1:5>> | Accu]);
 decode0(<<"i", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<1:5>>|Accu]);
+    decode0(Next, [<<1:5>> | Accu]);
 decode0(<<"L", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<1:5>>|Accu]);
+    decode0(Next, [<<1:5>> | Accu]);
 decode0(<<"l", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<1:5>>|Accu]);
+    decode0(Next, [<<1:5>> | Accu]);
 decode0(<<"2", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<2:5>>|Accu]);
+    decode0(Next, [<<2:5>> | Accu]);
 decode0(<<"3", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<3:5>>|Accu]);
+    decode0(Next, [<<3:5>> | Accu]);
 decode0(<<"4", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<4:5>>|Accu]);
+    decode0(Next, [<<4:5>> | Accu]);
 decode0(<<"5", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<5:5>>|Accu]);
+    decode0(Next, [<<5:5>> | Accu]);
 decode0(<<"6", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<6:5>>|Accu]);
+    decode0(Next, [<<6:5>> | Accu]);
 decode0(<<"7", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<7:5>>|Accu]);
+    decode0(Next, [<<7:5>> | Accu]);
 decode0(<<"8", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<8:5>>|Accu]);
+    decode0(Next, [<<8:5>> | Accu]);
 decode0(<<"9", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<9:5>>|Accu]);
+    decode0(Next, [<<9:5>> | Accu]);
 decode0(<<"A", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<10:5>>|Accu]);
+    decode0(Next, [<<10:5>> | Accu]);
 decode0(<<"a", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<10:5>>|Accu]);
+    decode0(Next, [<<10:5>> | Accu]);
 decode0(<<"B", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<11:5>>|Accu]);
+    decode0(Next, [<<11:5>> | Accu]);
 decode0(<<"b", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<11:5>>|Accu]);
+    decode0(Next, [<<11:5>> | Accu]);
 decode0(<<"C", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<12:5>>|Accu]);
+    decode0(Next, [<<12:5>> | Accu]);
 decode0(<<"c", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<12:5>>|Accu]);
+    decode0(Next, [<<12:5>> | Accu]);
 decode0(<<"D", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<13:5>>|Accu]);
+    decode0(Next, [<<13:5>> | Accu]);
 decode0(<<"d", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<13:5>>|Accu]);
+    decode0(Next, [<<13:5>> | Accu]);
 decode0(<<"E", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<14:5>>|Accu]);
+    decode0(Next, [<<14:5>> | Accu]);
 decode0(<<"e", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<14:5>>|Accu]);
+    decode0(Next, [<<14:5>> | Accu]);
 decode0(<<"F", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<15:5>>|Accu]);
+    decode0(Next, [<<15:5>> | Accu]);
 decode0(<<"f", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<15:5>>|Accu]);
+    decode0(Next, [<<15:5>> | Accu]);
 decode0(<<"G", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<16:5>>|Accu]);
+    decode0(Next, [<<16:5>> | Accu]);
 decode0(<<"g", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<16:5>>|Accu]);
+    decode0(Next, [<<16:5>> | Accu]);
 decode0(<<"H", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<17:5>>|Accu]);
+    decode0(Next, [<<17:5>> | Accu]);
 decode0(<<"h", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<17:5>>|Accu]);
+    decode0(Next, [<<17:5>> | Accu]);
 decode0(<<"J", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<18:5>>|Accu]);
+    decode0(Next, [<<18:5>> | Accu]);
 decode0(<<"j", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<18:5>>|Accu]);
+    decode0(Next, [<<18:5>> | Accu]);
 decode0(<<"K", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<19:5>>|Accu]);
+    decode0(Next, [<<19:5>> | Accu]);
 decode0(<<"k", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<19:5>>|Accu]);
+    decode0(Next, [<<19:5>> | Accu]);
 decode0(<<"M", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<20:5>>|Accu]);
+    decode0(Next, [<<20:5>> | Accu]);
 decode0(<<"m", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<20:5>>|Accu]);
+    decode0(Next, [<<20:5>> | Accu]);
 decode0(<<"N", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<21:5>>|Accu]);
+    decode0(Next, [<<21:5>> | Accu]);
 decode0(<<"n", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<21:5>>|Accu]);
+    decode0(Next, [<<21:5>> | Accu]);
 decode0(<<"P", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<22:5>>|Accu]);
+    decode0(Next, [<<22:5>> | Accu]);
 decode0(<<"p", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<22:5>>|Accu]);
+    decode0(Next, [<<22:5>> | Accu]);
 decode0(<<"Q", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<23:5>>|Accu]);
+    decode0(Next, [<<23:5>> | Accu]);
 decode0(<<"q", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<23:5>>|Accu]);
+    decode0(Next, [<<23:5>> | Accu]);
 decode0(<<"R", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<24:5>>|Accu]);
+    decode0(Next, [<<24:5>> | Accu]);
 decode0(<<"r", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<24:5>>|Accu]);
+    decode0(Next, [<<24:5>> | Accu]);
 decode0(<<"S", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<25:5>>|Accu]);
+    decode0(Next, [<<25:5>> | Accu]);
 decode0(<<"s", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<25:5>>|Accu]);
+    decode0(Next, [<<25:5>> | Accu]);
 decode0(<<"T", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<26:5>>|Accu]);
+    decode0(Next, [<<26:5>> | Accu]);
 decode0(<<"t", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<26:5>>|Accu]);
+    decode0(Next, [<<26:5>> | Accu]);
 decode0(<<"V", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<27:5>>|Accu]);
+    decode0(Next, [<<27:5>> | Accu]);
 decode0(<<"v", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<27:5>>|Accu]);
+    decode0(Next, [<<27:5>> | Accu]);
 decode0(<<"W", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<28:5>>|Accu]);
+    decode0(Next, [<<28:5>> | Accu]);
 decode0(<<"w", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<28:5>>|Accu]);
+    decode0(Next, [<<28:5>> | Accu]);
 decode0(<<"X", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<29:5>>|Accu]);
+    decode0(Next, [<<29:5>> | Accu]);
 decode0(<<"x", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<29:5>>|Accu]);
+    decode0(Next, [<<29:5>> | Accu]);
 decode0(<<"Y", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<30:5>>|Accu]);
+    decode0(Next, [<<30:5>> | Accu]);
 decode0(<<"y", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<30:5>>|Accu]);
+    decode0(Next, [<<30:5>> | Accu]);
 decode0(<<"Z", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<31:5>>|Accu]);
+    decode0(Next, [<<31:5>> | Accu]);
 decode0(<<"z", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<31:5>>|Accu]);
+    decode0(Next, [<<31:5>> | Accu]);
 decode0(<<"-", Next/bitstring>>, Accu) ->
     decode0(Next, Accu).
-
diff --git a/src/base32_rfc4648.erl b/src/base32_rfc4648.erl
index 8bfdaf8..8d778fd 100644
--- a/src/base32_rfc4648.erl
+++ b/src/base32_rfc4648.erl
@@ -4,292 +4,297 @@
 
 -import(base32_utils, [rev_bits_list_to_binary/1]).
 
+
 -spec encode(binary()) -> binary().
 encode(Data) ->
     list_to_binary(encode0(Data)).
 
+
 encode0(Data) ->
     Size = bit_size(Data),
     RevEncoded = case 40 - (Size rem 40) of
-        40 ->
-            encode1(Data, []);
-        32 ->
-            [$=, $=, $=, $=, $=, $=|encode1(Data, [])];
-        24 ->
-            [$=, $=, $=, $=|encode1(Data, [])];
-        16 ->
-            [$=, $=, $=|encode1(Data, [])];
-        8 ->
-            [$=|encode1(Data, [])]
-    end,
+                     40 ->
+                         encode1(Data, []);
+                     32 ->
+                         [$=, $=, $=, $=, $=, $= | encode1(Data, [])];
+                     24 ->
+                         [$=, $=, $=, $= | encode1(Data, [])];
+                     16 ->
+                         [$=, $=, $= | encode1(Data, [])];
+                     8 ->
+                         [$= | encode1(Data, [])]
+                 end,
     lists:reverse(RevEncoded).
 
+
 encode1(<<>>, Accu) ->
     Accu;
 
 encode1(<<0:5, Next/bitstring>>, Accu) ->
-    encode1(Next, [$A|Accu]);
+    encode1(Next, [$A | Accu]);
 encode1(<<1:5, Next/bitstring>>, Accu) ->
-    encode1(Next, [$B|Accu]);
+    encode1(Next, [$B | Accu]);
 encode1(<<2:5, Next/bitstring>>, Accu) ->
-    encode1(Next, [$C|Accu]);
+    encode1(Next, [$C | Accu]);
 encode1(<<3:5, Next/bitstring>>, Accu) ->
-    encode1(Next, [$D|Accu]);
+    encode1(Next, [$D | Accu]);
 encode1(<<4:5, Next/bitstring>>, Accu) ->
-    encode1(Next, [$E|Accu]);
+    encode1(Next, [$E | Accu]);
 encode1(<<5:5, Next/bitstring>>, Accu) ->
-    encode1(Next, [$F|Accu]);
+    encode1(Next, [$F | Accu]);
 encode1(<<6:5, Next/bitstring>>, Accu) ->
-    encode1(Next, [$G|Accu]);
+    encode1(Next, [$G | Accu]);
 encode1(<<7:5, Next/bitstring>>, Accu) ->
-    encode1(Next, [$H|Accu]);
+    encode1(Next, [$H | Accu]);
 encode1(<<8:5, Next/bitstring>>, Accu) ->
-    encode1(Next, [$I|Accu]);
+    encode1(Next, [$I | Accu]);
 encode1(<<9:5, Next/bitstring>>, Accu) ->
-    encode1(Next, [$J|Accu]);
+    encode1(Next, [$J | Accu]);
 encode1(<<10:5, Next/bitstring>>, Accu) ->
-    encode1(Next, [$K|Accu]);
+    encode1(Next, [$K | Accu]);
 encode1(<<11:5, Next/bitstring>>, Accu) ->
-    encode1(Next, [$L|Accu]);
+    encode1(Next, [$L | Accu]);
 encode1(<<12:5, Next/bitstring>>, Accu) ->
-    encode1(Next, [$M|Accu]);
+    encode1(Next, [$M | Accu]);
 encode1(<<13:5, Next/bitstring>>, Accu) ->
-    encode1(Next, [$N|Accu]);
+    encode1(Next, [$N | Accu]);
 encode1(<<14:5, Next/bitstring>>, Accu) ->
-    encode1(Next, [$O|Accu]);
+    encode1(Next, [$O | Accu]);
 encode1(<<15:5, Next/bitstring>>, Accu) ->
-    encode1(Next, [$P|Accu]);
+    encode1(Next, [$P | Accu]);
 encode1(<<16:5, Next/bitstring>>, Accu) ->
-    encode1(Next, [$Q|Accu]);
+    encode1(Next, [$Q | Accu]);
 encode1(<<17:5, Next/bitstring>>, Accu) ->
-    encode1(Next, [$R|Accu]);
+    encode1(Next, [$R | Accu]);
 encode1(<<18:5, Next/bitstring>>, Accu) ->
-    encode1(Next, [$S|Accu]);
+    encode1(Next, [$S | Accu]);
 encode1(<<19:5, Next/bitstring>>, Accu) ->
-    encode1(Next, [$T|Accu]);
+    encode1(Next, [$T | Accu]);
 encode1(<<20:5, Next/bitstring>>, Accu) ->
-    encode1(Next, [$U|Accu]);
+    encode1(Next, [$U | Accu]);
 encode1(<<21:5, Next/bitstring>>, Accu) ->
-    encode1(Next, [$V|Accu]);
+    encode1(Next, [$V | Accu]);
 encode1(<<22:5, Next/bitstring>>, Accu) ->
-    encode1(Next, [$W|Accu]);
+    encode1(Next, [$W | Accu]);
 encode1(<<23:5, Next/bitstring>>, Accu) ->
-    encode1(Next, [$X|Accu]);
+    encode1(Next, [$X | Accu]);
 encode1(<<24:5, Next/bitstring>>, Accu) ->
-    encode1(Next, [$Y|Accu]);
+    encode1(Next, [$Y | Accu]);
 encode1(<<25:5, Next/bitstring>>, Accu) ->
-    encode1(Next, [$Z|Accu]);
+    encode1(Next, [$Z | Accu]);
 encode1(<<26:5, Next/bitstring>>, Accu) ->
-    encode1(Next, [$2|Accu]);
+    encode1(Next, [$2 | Accu]);
 encode1(<<27:5, Next/bitstring>>, Accu) ->
-    encode1(Next, [$3|Accu]);
+    encode1(Next, [$3 | Accu]);
 encode1(<<28:5, Next/bitstring>>, Accu) ->
-    encode1(Next, [$4|Accu]);
+    encode1(Next, [$4 | Accu]);
 encode1(<<29:5, Next/bitstring>>, Accu) ->
-    encode1(Next, [$5|Accu]);
+    encode1(Next, [$5 | Accu]);
 encode1(<<30:5, Next/bitstring>>, Accu) ->
-    encode1(Next, [$6|Accu]);
+    encode1(Next, [$6 | Accu]);
 encode1(<<31:5, Next/bitstring>>, Accu) ->
-    encode1(Next, [$7|Accu]);
+    encode1(Next, [$7 | Accu]);
 
 encode1(<<0:4>>, Accu) ->
-    [$A|Accu];
+    [$A | Accu];
 encode1(<<1:4>>, Accu) ->
-    [$C|Accu];
+    [$C | Accu];
 encode1(<<2:4>>, Accu) ->
-    [$E|Accu];
+    [$E | Accu];
 encode1(<<3:4>>, Accu) ->
-    [$G|Accu];
+    [$G | Accu];
 encode1(<<4:4>>, Accu) ->
-    [$I|Accu];
+    [$I | Accu];
 encode1(<<5:4>>, Accu) ->
-    [$K|Accu];
+    [$K | Accu];
 encode1(<<6:4>>, Accu) ->
-    [$M|Accu];
+    [$M | Accu];
 encode1(<<7:4>>, Accu) ->
-    [$O|Accu];
+    [$O | Accu];
 encode1(<<8:4>>, Accu) ->
-    [$Q|Accu];
+    [$Q | Accu];
 encode1(<<9:4>>, Accu) ->
-    [$S|Accu];
+    [$S | Accu];
 encode1(<<10:4>>, Accu) ->
-    [$U|Accu];
+    [$U | Accu];
 encode1(<<11:4>>, Accu) ->
-    [$W|Accu];
+    [$W | Accu];
 encode1(<<12:4>>, Accu) ->
-    [$Y|Accu];
+    [$Y | Accu];
 encode1(<<13:4>>, Accu) ->
-    [$2|Accu];
+    [$2 | Accu];
 encode1(<<14:4>>, Accu) ->
-    [$4|Accu];
+    [$4 | Accu];
 encode1(<<15:4>>, Accu) ->
-    [$6|Accu];
+    [$6 | Accu];
 
 encode1(<<0:3>>, Accu) ->
-    [$A|Accu];
+    [$A | Accu];
 encode1(<<1:3>>, Accu) ->
-    [$E|Accu];
+    [$E | Accu];
 encode1(<<2:3>>, Accu) ->
-    [$I|Accu];
+    [$I | Accu];
 encode1(<<3:3>>, Accu) ->
-    [$M|Accu];
+    [$M | Accu];
 encode1(<<4:3>>, Accu) ->
-    [$Q|Accu];
+    [$Q | Accu];
 encode1(<<5:3>>, Accu) ->
-    [$U|Accu];
+    [$U | Accu];
 encode1(<<6:3>>, Accu) ->
-    [$Y|Accu];
+    [$Y | Accu];
 encode1(<<7:3>>, Accu) ->
-    [$4|Accu];
+    [$4 | Accu];
 
 encode1(<<0:2>>, Accu) ->
-    [$A|Accu];
+    [$A | Accu];
 encode1(<<1:2>>, Accu) ->
-    [$I|Accu];
+    [$I | Accu];
 encode1(<<2:2>>, Accu) ->
-    [$Q|Accu];
+    [$Q | Accu];
 encode1(<<3:2>>, Accu) ->
-    [$Y|Accu];
+    [$Y | Accu];
 
 encode1(<<0:1>>, Accu) ->
-    [$A|Accu];
+    [$A | Accu];
 encode1(<<1:1>>, Accu) ->
-    [$Q|Accu].
+    [$Q | Accu].
+
 
 -spec decode(binary()) -> {ok, binary()} | {error, atom()}.
 decode(Data) ->
     decode0(Data, []).
 
+
 decode0(<<>>, Accu) ->
     {ok, rev_bits_list_to_binary(Accu)};
 decode0(<<"A", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<0:5>>|Accu]);
+    decode0(Next, [<<0:5>> | Accu]);
 decode0(<<"B", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<1:5>>|Accu]);
+    decode0(Next, [<<1:5>> | Accu]);
 decode0(<<"C", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<2:5>>|Accu]);
+    decode0(Next, [<<2:5>> | Accu]);
 decode0(<<"D", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<3:5>>|Accu]);
+    decode0(Next, [<<3:5>> | Accu]);
 decode0(<<"E", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<4:5>>|Accu]);
+    decode0(Next, [<<4:5>> | Accu]);
 decode0(<<"F", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<5:5>>|Accu]);
+    decode0(Next, [<<5:5>> | Accu]);
 decode0(<<"G", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<6:5>>|Accu]);
+    decode0(Next, [<<6:5>> | Accu]);
 decode0(<<"H", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<7:5>>|Accu]);
+    decode0(Next, [<<7:5>> | Accu]);
 decode0(<<"I", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<8:5>>|Accu]);
+    decode0(Next, [<<8:5>> | Accu]);
 decode0(<<"J", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<9:5>>|Accu]);
+    decode0(Next, [<<9:5>> | Accu]);
 decode0(<<"K", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<10:5>>|Accu]);
+    decode0(Next, [<<10:5>> | Accu]);
 decode0(<<"L", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<11:5>>|Accu]);
+    decode0(Next, [<<11:5>> | Accu]);
 decode0(<<"M", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<12:5>>|Accu]);
+    decode0(Next, [<<12:5>> | Accu]);
 decode0(<<"N", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<13:5>>|Accu]);
+    decode0(Next, [<<13:5>> | Accu]);
 decode0(<<"O", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<14:5>>|Accu]);
+    decode0(Next, [<<14:5>> | Accu]);
 decode0(<<"P", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<15:5>>|Accu]);
+    decode0(Next, [<<15:5>> | Accu]);
 decode0(<<"Q", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<16:5>>|Accu]);
+    decode0(Next, [<<16:5>> | Accu]);
 decode0(<<"R", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<17:5>>|Accu]);
+    decode0(Next, [<<17:5>> | Accu]);
 decode0(<<"S", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<18:5>>|Accu]);
+    decode0(Next, [<<18:5>> | Accu]);
 decode0(<<"T", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<19:5>>|Accu]);
+    decode0(Next, [<<19:5>> | Accu]);
 decode0(<<"U", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<20:5>>|Accu]);
+    decode0(Next, [<<20:5>> | Accu]);
 decode0(<<"V", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<21:5>>|Accu]);
+    decode0(Next, [<<21:5>> | Accu]);
 decode0(<<"W", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<22:5>>|Accu]);
+    decode0(Next, [<<22:5>> | Accu]);
 decode0(<<"X", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<23:5>>|Accu]);
+    decode0(Next, [<<23:5>> | Accu]);
 decode0(<<"Y", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<24:5>>|Accu]);
+    decode0(Next, [<<24:5>> | Accu]);
 decode0(<<"Z", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<25:5>>|Accu]);
+    decode0(Next, [<<25:5>> | Accu]);
 decode0(<<"2", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<26:5>>|Accu]);
+    decode0(Next, [<<26:5>> | Accu]);
 decode0(<<"3", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<27:5>>|Accu]);
+    decode0(Next, [<<27:5>> | Accu]);
 decode0(<<"4", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<28:5>>|Accu]);
+    decode0(Next, [<<28:5>> | Accu]);
 decode0(<<"5", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<29:5>>|Accu]);
+    decode0(Next, [<<29:5>> | Accu]);
 decode0(<<"6", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<30:5>>|Accu]);
+    decode0(Next, [<<30:5>> | Accu]);
 decode0(<<"7", Next/bitstring>>, Accu) ->
-    decode0(Next, [<<31:5>>|Accu]);
+    decode0(Next, [<<31:5>> | Accu]);
 
-decode0(<<"======">>, [<<0:5>>|Accu]) ->
-    decode0(<<>>, [<<0:3>>|Accu]);
-decode0(<<"======">>, [<<4:5>>|Accu]) ->
-    decode0(<<>>, [<<1:3>>|Accu]);
-decode0(<<"======">>, [<<8:5>>|Accu]) ->
-    decode0(<<>>, [<<2:3>>|Accu]);
-decode0(<<"======">>, [<<12:5>>|Accu]) ->
-    decode0(<<>>, [<<3:3>>|Accu]);
-decode0(<<"======">>, [<<16:5>>|Accu]) ->
-    decode0(<<>>, [<<4:3>>|Accu]);
-decode0(<<"======">>, [<<20:5>>|Accu]) ->
-    decode0(<<>>, [<<5:3>>|Accu]);
-decode0(<<"======">>, [<<24:5>>|Accu]) ->
-    decode0(<<>>, [<<6:3>>|Accu]);
-decode0(<<"======">>, [<<28:5>>|Accu]) ->
-    decode0(<<>>, [<<7:3>>|Accu]);
+decode0(<<"======">>, [<<0:5>> | Accu]) ->
+    decode0(<<>>, [<<0:3>> | Accu]);
+decode0(<<"======">>, [<<4:5>> | Accu]) ->
+    decode0(<<>>, [<<1:3>> | Accu]);
+decode0(<<"======">>, [<<8:5>> | Accu]) ->
+    decode0(<<>>, [<<2:3>> | Accu]);
+decode0(<<"======">>, [<<12:5>> | Accu]) ->
+    decode0(<<>>, [<<3:3>> | Accu]);
+decode0(<<"======">>, [<<16:5>> | Accu]) ->
+    decode0(<<>>, [<<4:3>> | Accu]);
+decode0(<<"======">>, [<<20:5>> | Accu]) ->
+    decode0(<<>>, [<<5:3>> | Accu]);
+decode0(<<"======">>, [<<24:5>> | Accu]) ->
+    decode0(<<>>, [<<6:3>> | Accu]);
+decode0(<<"======">>, [<<28:5>> | Accu]) ->
+    decode0(<<>>, [<<7:3>> | Accu]);
 
-decode0(<<"====">>, [<<0:5>>|Accu]) ->
-    decode0(<<>>, [<<0:1>>|Accu]);
-decode0(<<"====">>, [<<16:5>>|Accu]) ->
-    decode0(<<>>, [<<1:1>>|Accu]);
+decode0(<<"====">>, [<<0:5>> | Accu]) ->
+    decode0(<<>>, [<<0:1>> | Accu]);
+decode0(<<"====">>, [<<16:5>> | Accu]) ->
+    decode0(<<>>, [<<1:1>> | Accu]);
 
-decode0(<<"===">>, [<<0:5>>|Accu]) ->
-    decode0(<<>>, [<<0:4>>|Accu]);
-decode0(<<"===">>, [<<2:5>>|Accu]) ->
-    decode0(<<>>, [<<1:4>>|Accu]);
-decode0(<<"===">>, [<<4:5>>|Accu]) ->
-    decode0(<<>>, [<<2:4>>|Accu]);
-decode0(<<"===">>, [<<6:5>>|Accu]) ->
-    decode0(<<>>, [<<3:4>>|Accu]);
-decode0(<<"===">>, [<<8:5>>|Accu]) ->
-    decode0(<<>>, [<<4:4>>|Accu]);
-decode0(<<"===">>, [<<10:5>>|Accu]) ->
-    decode0(<<>>, [<<5:4>>|Accu]);
-decode0(<<"===">>, [<<12:5>>|Accu]) ->
-    decode0(<<>>, [<<6:4>>|Accu]);
-decode0(<<"===">>, [<<14:5>>|Accu]) ->
-    decode0(<<>>, [<<7:4>>|Accu]);
-decode0(<<"===">>, [<<16:5>>|Accu]) ->
-    decode0(<<>>, [<<8:4>>|Accu]);
-decode0(<<"===">>, [<<18:5>>|Accu]) ->
-    decode0(<<>>, [<<9:4>>|Accu]);
-decode0(<<"===">>, [<<20:5>>|Accu]) ->
-    decode0(<<>>, [<<10:4>>|Accu]);
-decode0(<<"===">>, [<<22:5>>|Accu]) ->
-    decode0(<<>>, [<<11:4>>|Accu]);
-decode0(<<"===">>, [<<24:5>>|Accu]) ->
-    decode0(<<>>, [<<12:4>>|Accu]);
-decode0(<<"===">>, [<<26:5>>|Accu]) ->
-    decode0(<<>>, [<<13:4>>|Accu]);
-decode0(<<"===">>, [<<28:5>>|Accu]) ->
-    decode0(<<>>, [<<14:4>>|Accu]);
-decode0(<<"===">>, [<<30:5>>|Accu]) ->
-    decode0(<<>>, [<<15:4>>|Accu]);
+decode0(<<"===">>, [<<0:5>> | Accu]) ->
+    decode0(<<>>, [<<0:4>> | Accu]);
+decode0(<<"===">>, [<<2:5>> | Accu]) ->
+    decode0(<<>>, [<<1:4>> | Accu]);
+decode0(<<"===">>, [<<4:5>> | Accu]) ->
+    decode0(<<>>, [<<2:4>> | Accu]);
+decode0(<<"===">>, [<<6:5>> | Accu]) ->
+    decode0(<<>>, [<<3:4>> | Accu]);
+decode0(<<"===">>, [<<8:5>> | Accu]) ->
+    decode0(<<>>, [<<4:4>> | Accu]);
+decode0(<<"===">>, [<<10:5>> | Accu]) ->
+    decode0(<<>>, [<<5:4>> | Accu]);
+decode0(<<"===">>, [<<12:5>> | Accu]) ->
+    decode0(<<>>, [<<6:4>> | Accu]);
+decode0(<<"===">>, [<<14:5>> | Accu]) ->
+    decode0(<<>>, [<<7:4>> | Accu]);
+decode0(<<"===">>, [<<16:5>> | Accu]) ->
+    decode0(<<>>, [<<8:4>> | Accu]);
+decode0(<<"===">>, [<<18:5>> | Accu]) ->
+    decode0(<<>>, [<<9:4>> | Accu]);
+decode0(<<"===">>, [<<20:5>> | Accu]) ->
+    decode0(<<>>, [<<10:4>> | Accu]);
+decode0(<<"===">>, [<<22:5>> | Accu]) ->
+    decode0(<<>>, [<<11:4>> | Accu]);
+decode0(<<"===">>, [<<24:5>> | Accu]) ->
+    decode0(<<>>, [<<12:4>> | Accu]);
+decode0(<<"===">>, [<<26:5>> | Accu]) ->
+    decode0(<<>>, [<<13:4>> | Accu]);
+decode0(<<"===">>, [<<28:5>> | Accu]) ->
+    decode0(<<>>, [<<14:4>> | Accu]);
+decode0(<<"===">>, [<<30:5>> | Accu]) ->
+    decode0(<<>>, [<<15:4>> | Accu]);
 
-decode0(<<"=">>, [<<0:5>>|Accu]) ->
-    decode0(<<>>, [<<0:2>>|Accu]);
-decode0(<<"=">>, [<<8:5>>|Accu]) ->
-    decode0(<<>>, [<<1:2>>|Accu]);
-decode0(<<"=">>, [<<16:5>>|Accu]) ->
-    decode0(<<>>, [<<2:2>>|Accu]);
-decode0(<<"=">>, [<<24:5>>|Accu]) ->
-    decode0(<<>>, [<<3:2>>|Accu]);
+decode0(<<"=">>, [<<0:5>> | Accu]) ->
+    decode0(<<>>, [<<0:2>> | Accu]);
+decode0(<<"=">>, [<<8:5>> | Accu]) ->
+    decode0(<<>>, [<<1:2>> | Accu]);
+decode0(<<"=">>, [<<16:5>> | Accu]) ->
+    decode0(<<>>, [<<2:2>> | Accu]);
+decode0(<<"=">>, [<<24:5>> | Accu]) ->
+    decode0(<<>>, [<<3:2>> | Accu]);
 
 decode0(_, _) ->
     {error, invalid_format}.
diff --git a/src/base32_utils.erl b/src/base32_utils.erl
index 6236aa4..a7f0100 100644
--- a/src/base32_utils.erl
+++ b/src/base32_utils.erl
@@ -2,18 +2,22 @@
 
 -export([rev_bits_list_to_binary/1, bits_list_size/1]).
 
+
 rev_bits_list_to_binary(List) ->
     rev_bits_list_to_binary0(List, <<>>).
 
+
 rev_bits_list_to_binary0([], Accu) ->
     Accu;
-rev_bits_list_to_binary0([Bits|Next], Accu) ->
+rev_bits_list_to_binary0([Bits | Next], Accu) ->
     rev_bits_list_to_binary0(Next, <<Bits/bitstring, Accu/bitstring>>).
 
+
 bits_list_size(List) ->
     bits_list_size0(List, 0).
 
+
 bits_list_size0([], Count) ->
     Count;
-bits_list_size0([Bits|Next], Count) ->
+bits_list_size0([Bits | Next], Count) ->
     bits_list_size0(Next, bit_size(Bits) + Count).
diff --git a/test/base32_clockwork_test.erl b/test/base32_clockwork_test.erl
index 67d00a7..bd2f3a4 100644
--- a/test/base32_clockwork_test.erl
+++ b/test/base32_clockwork_test.erl
@@ -4,6 +4,7 @@
 
 -import(base32_clockwork, [encode/1, decode/1]).
 
+
 encode_test() ->
     ?assertEqual(<<>>, encode(<<>>)),
     ?assertEqual(<<"CR">>, encode(<<"f">>)),
@@ -13,10 +14,11 @@ encode_test() ->
     ?assertEqual(<<"CSQPYRK1">>, encode(<<"fooba">>)),
     ?assertEqual(<<"CSQPYRK1E8">>, encode(<<"foobar">>)),
     ?assertEqual(<<"07EKWRQY2N7DEAVD5MJ3JX36KM">>,
-                 encode(<<1,221,62,98,254,21,78,215,43,109,45,36,57,116,102,157>>)),
+                 encode(<<1, 221, 62, 98, 254, 21, 78, 215, 43, 109, 45, 36, 57, 116, 102, 157>>)),
     ?assertEqual(<<"AXQQEB10D5T20WK5C5P6RY90EXQQ4TVK44">>,
                  encode(<<"Wow, it really works!">>)).
 
+
 decode_test() ->
     ?assertEqual({ok, <<>>}, decode(<<>>)),
     ?assertEqual({ok, <<"f">>}, decode(<<"CR">>)),
@@ -25,11 +27,12 @@ decode_test() ->
     ?assertEqual({ok, <<"foob">>}, decode(<<"CSQPYRG">>)),
     ?assertEqual({ok, <<"fooba">>}, decode(<<"CSQPYRK1">>)),
     ?assertEqual({ok, <<"foobar">>}, decode(<<"CSQPYRK1E8">>)),
-    ?assertEqual({ok, <<1,221,62,98,254,21,78,215,43,109,45,36,57,116,102,157>>},
+    ?assertEqual({ok, <<1, 221, 62, 98, 254, 21, 78, 215, 43, 109, 45, 36, 57, 116, 102, 157>>},
                  decode(<<"07EKWRQY2N7DEAVD5MJ3JX36KM">>)),
     ?assertEqual({ok, <<"Wow, it really works!">>},
                  decode(<<"AXQQEB10D5T20WK5C5P6RY90EXQQ4TVK44">>)).
 
+
 decode_error_test() ->
     ?assertEqual({error, invalid_size}, decode(<<"0">>)),
     ?assertEqual({error, invalid_format}, decode(<<"012*">>)).
diff --git a/test/base32_crockford_test.erl b/test/base32_crockford_test.erl
index 3ab4f48..0737272 100644
--- a/test/base32_crockford_test.erl
+++ b/test/base32_crockford_test.erl
@@ -2,10 +2,12 @@
 
 -include_lib("eunit/include/eunit.hrl").
 
--import(base32_crockford, [encode/1,
-                           encode_check/1,
-                           decode/1,
-                           decode_check/1]).
+-import(base32_crockford,
+        [encode/1,
+         encode_check/1,
+         decode/1,
+         decode_check/1]).
+
 
 encode_nocheck_test() ->
     ?assertEqual(<<"CR">>, encode(<<"f">>)),
@@ -15,6 +17,7 @@ encode_nocheck_test() ->
     ?assertEqual(<<"CSQPYRK1">>, encode(<<"fooba">>)),
     ?assertEqual(<<"CSQPYRK1E8">>, encode(<<"foobar">>)).
 
+
 encode_check_test() ->
     ?assertEqual(<<"CRW">>, encode_check(<<"f">>)),
     ?assertEqual(<<"CSQGV">>, encode_check(<<"fo">>)),
@@ -23,6 +26,7 @@ encode_check_test() ->
     ?assertEqual(<<"CSQPYRK1U">>, encode_check(<<"fooba">>)),
     ?assertEqual(<<"CSQPYRK1E86">>, encode_check(<<"foobar">>)).
 
+
 decode_nocheck_test() ->
     ?assertEqual(<<"f">>, decode(<<"CR">>)),
     ?assertEqual(<<"fo">>, decode(<<"CSQG">>)),
@@ -31,6 +35,7 @@ decode_nocheck_test() ->
     ?assertEqual(<<"fooba">>, decode(<<"CSQPYRK1">>)),
     ?assertEqual(<<"foobar">>, decode(<<"CSQPYRK1E8">>)).
 
+
 decode_check_test() ->
     ?assertEqual({ok, <<"f">>}, decode_check(<<"CRW">>)),
     ?assertEqual({ok, <<"fo">>}, decode_check(<<"CSQGV">>)),
@@ -39,6 +44,7 @@ decode_check_test() ->
     ?assertEqual({ok, <<"fooba">>}, decode_check(<<"CSQPYRK1U">>)),
     ?assertEqual({ok, <<"foobar">>}, decode_check(<<"CSQPYRK1E86">>)).
 
+
 decode_hyphen_test() ->
     ?assertEqual(<<"foobar">>, decode(<<"-CSQPYRK1E8">>)),
     ?assertEqual(<<"foobar">>, decode(<<"---CSQPYRK1E8">>)),
@@ -49,13 +55,15 @@ decode_hyphen_test() ->
     ?assertEqual(<<"foobar">>, decode(<<"CSQ-PYR-K1E-8">>)),
     ?assertEqual(<<"foobar">>, decode(<<"CSQ--PYR--K1E--8">>)).
 
+
 other1_test() ->
-    P = <<1,221,62,98,254,21,78,215,43,109,45,36,57,116,102,157>>,
+    P = <<1, 221, 62, 98, 254, 21, 78, 215, 43, 109, 45, 36, 57, 116, 102, 157>>,
     E = <<"07EKWRQY2N7DEAVD5MJ3JX36KM">>,
     ?assertEqual(E, encode(P)),
     ?assertEqual(P, decode(E)),
     ok.
 
+
 other2_test() ->
     %% https://github.com/aiq/basexx/blob/master/test/crockford_spec.lua
     P = <<"Wow, it really works!">>,
diff --git a/test/base32_rfc4648_test.erl b/test/base32_rfc4648_test.erl
index a18c44c..15a9582 100644
--- a/test/base32_rfc4648_test.erl
+++ b/test/base32_rfc4648_test.erl
@@ -4,6 +4,7 @@
 
 -import(base32_rfc4648, [encode/1, decode/1]).
 
+
 encode_test() ->
     ?assertEqual(<<"MY======">>, encode(<<"f">>)),
     ?assertEqual(<<"MZXQ====">>, encode(<<"fo">>)),
@@ -12,6 +13,7 @@ encode_test() ->
     ?assertEqual(<<"MZXW6YTB">>, encode(<<"fooba">>)),
     ?assertEqual(<<"MZXW6YTBOI======">>, encode(<<"foobar">>)).
 
+
 decode_test() ->
     ?assertEqual({ok, <<"f">>}, decode(<<"MY======">>)),
     ?assertEqual({ok, <<"fo">>}, decode(<<"MZXQ====">>)),
@@ -20,6 +22,6 @@ decode_test() ->
     ?assertEqual({ok, <<"fooba">>}, decode(<<"MZXW6YTB">>)),
     ?assertEqual({ok, <<"foobar">>}, decode(<<"MZXW6YTBOI======">>)).
 
+
 decode_error_test() ->
     ?assertEqual({error, invalid_format}, decode(<<"MZXW6YTBOI======A">>)).
-
diff --git a/test/base32_test.erl b/test/base32_test.erl
index fafa760..1d964c1 100644
--- a/test/base32_test.erl
+++ b/test/base32_test.erl
@@ -4,6 +4,7 @@
 
 -import(base32, [encode/2, decode/2]).
 
+
 rfc4648_test() ->
     Data = <<"foobar">>,
     Encoded = encode(rfc4648, Data),
@@ -11,10 +12,10 @@ rfc4648_test() ->
     ?assertEqual(Encoded, base32_rfc4648:encode(Data)),
     ?assertEqual(Decoded, base32_rfc4648:decode(Encoded)).
 
+
 crockford_nocheck_test() ->
     Data = <<"foobar">>,
     Encoded = encode(crockford, Data),
     {ok, Decoded} = decode(crockford, Encoded),
     ?assertEqual(Encoded, base32_crockford:encode(Data)),
     ?assertEqual(Decoded, base32_crockford:decode(Encoded)).
-