diff --git a/Gemfile b/Gemfile
index 98ffae3..5e78638 100644
--- a/Gemfile
+++ b/Gemfile
@@ -14,7 +14,7 @@ group :development do
   gem 'rubocop'
 
   # debug
-  gem 'pry', '~> 0.14.1'
+  gem 'pry', '~> 0.15.0'
 
   # deploy
   gem 'mina', '~> 1.2.4' # for fast deployment
diff --git a/Gemfile.lock b/Gemfile.lock
index 2054bd9..83d4aab 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -21,7 +21,7 @@ GEM
     i18n (1.11.0)
       concurrent-ruby (~> 1.0)
     json (2.5.1)
-    method_source (1.0.0)
+    method_source (1.1.0)
     mina (1.2.4)
       open4 (~> 1.3.4)
       rake
@@ -31,7 +31,7 @@ GEM
     parser (3.0.2.0)
       ast (~> 2.4.1)
     pg (1.4.0)
-    pry (0.14.1)
+    pry (0.15.0)
       coderay (~> 1.1)
       method_source (~> 1.0)
     rainbow (3.0.0)
@@ -75,7 +75,7 @@ DEPENDENCIES
   mina (~> 1.2.4)
   minitest
   pg (~> 1.4.0)
-  pry (~> 0.14.1)
+  pry (~> 0.15.0)
   rubocop
   simplecov (= 0.17.1)
   simpleidn (~> 0.2.1)