diff --git a/lib/eth.ex b/lib/eth.ex
index f342cf7..80b831c 100644
--- a/lib/eth.ex
+++ b/lib/eth.ex
@@ -62,11 +62,11 @@ defmodule ETH do
   defdelegate hash(transaction, include_signature), to: ETH.Transaction
 
   defdelegate sign_transaction(transaction, private_key), to: ETH.Transaction.Signer
-  defdelegate sign_transaction_list(transaction_list, private_key), to: ETH.Transaction.Signer
   defdelegate decode(rlp_encoded_transaction), to: ETH.Transaction.Signer
   defdelegate encode(signed_transaction_list), to: ETH.Transaction.Signer
 
   defdelegate send_transaction(params_or_wallet, private_key_or_params), to: ETH.Transaction
+
   defdelegate send_transaction(sender_wallet, receiver_wallet, value_or_params),
     to: ETH.Transaction
 
diff --git a/lib/eth/transaction.ex b/lib/eth/transaction.ex
index 1fe549e..a56b79d 100644
--- a/lib/eth/transaction.ex
+++ b/lib/eth/transaction.ex
@@ -12,7 +12,6 @@ defmodule ETH.Transaction do
   defdelegate hash(transaction, include_signature), to: ETH.Transaction.Signer
 
   defdelegate sign_transaction(transaction, private_key), to: ETH.Transaction.Signer
-  defdelegate sign_transaction_list(transaction_list, private_key), to: ETH.Transaction.Signer
   defdelegate decode(rlp_encoded_transaction), to: ETH.Transaction.Signer
   defdelegate encode(signed_transaction_list), to: ETH.Transaction.Signer
 
diff --git a/lib/eth/transaction/signer.ex b/lib/eth/transaction/signer.ex
index e9c2476..61b1e64 100644
--- a/lib/eth/transaction/signer.ex
+++ b/lib/eth/transaction/signer.ex
@@ -56,11 +56,11 @@ defmodule ETH.Transaction.Signer do
   def sign_transaction(transaction, private_key) when is_map(transaction) do
     transaction
     |> ETH.Transaction.to_list()
-    |> sign_transaction_list(private_key)
+    |> sign_transaction(private_key)
     |> ExRLP.encode()
   end
 
-  def sign_transaction_list(
+  def sign_transaction(
         transaction_list = [
           _nonce,
           _gas_price,
@@ -73,11 +73,11 @@ defmodule ETH.Transaction.Signer do
           _s
         ],
         <<private_key::binary-size(32)>>
-      ) do
-    to_signed_transaction_list(transaction_list, private_key)
+      ) when is_map(transaction_list) do
+    sign_transaction_list(transaction_list, private_key)
   end
 
-  def sign_transaction_list(
+  def sign_transaction(
         transaction_list = [
           _nonce,
           _gas_price,
@@ -90,12 +90,12 @@ defmodule ETH.Transaction.Signer do
           _s
         ],
         <<encoded_private_key::binary-size(64)>>
-      ) do
+      ) when is_list(transaction_list) do
     decoded_private_key = Base.decode16!(encoded_private_key, case: :mixed)
-    to_signed_transaction_list(transaction_list, decoded_private_key)
+    sign_transaction_list(transaction_list, decoded_private_key)
   end
 
-  defp to_signed_transaction_list(
+  defp sign_transaction_list(
          transaction_list = [
            nonce,
            gas_price,
@@ -104,8 +104,8 @@ defmodule ETH.Transaction.Signer do
            value,
            data,
            v,
-           _r,
-           _s
+           r,
+           s
          ],
          <<private_key::binary-size(32)>>
        ) do
diff --git a/mix.exs b/mix.exs
index 4ac396f..c3ef70e 100644
--- a/mix.exs
+++ b/mix.exs
@@ -4,7 +4,7 @@ defmodule Eth.Mixfile do
   def project do
     [
       app: :eth,
-      version: "0.3.0",
+      version: "0.3.1",
       elixir: "~> 1.5",
       start_permanent: Mix.env() == :prod,
       deps: deps(),
diff --git a/test/eth/eth_test.exs b/test/eth/eth_test.exs
index 93a30f1..e63042e 100644
--- a/test/eth/eth_test.exs
+++ b/test/eth/eth_test.exs
@@ -59,7 +59,6 @@ defmodule ETH.Test do
              send_transaction: 3,
              send_transaction: 4,
              sign_transaction: 2,
-             sign_transaction_list: 2,
              syncing: 0,
              syncing!: 0,
              to_buffer: 1,
diff --git a/test/eth/transaction_test.exs b/test/eth/transaction_test.exs
index 62587ca..9c3a6dd 100644
--- a/test/eth/transaction_test.exs
+++ b/test/eth/transaction_test.exs
@@ -159,7 +159,7 @@ defmodule TransactionTest do
         |> Map.get("raw")
         |> Transaction.parse()
         |> Transaction.to_list()
-        |> Transaction.sign_transaction_list(transaction["privateKey"])
+        |> Transaction.sign_transaction(transaction["privateKey"])
 
       result = Transaction.get_sender_address(signed_transaction_list)
       assert result == "0x" <> String.upcase(transaction["sendersAddress"])