diff --git a/Gemfile b/Gemfile
index cbd3cd62057166454f514f6b51f31e7c0111d87f..6d6958927282c875a78ba4b77dff5741cc50e157 100644
--- a/Gemfile
+++ b/Gemfile
@@ -27,7 +27,7 @@ group :test do
 
   platforms :ruby do
     gem 'pg'
-    gem 'mysql2', ~> '0.3.11'
+    gem 'mysql2', '~> 0.3.11'
   end
 
   platforms :jruby do
diff --git a/gemfiles/Gemfile.rails3.2 b/gemfiles/Gemfile.rails3.2
index afbce151263f3808c6e1c7afee4aba6db2ca32da..abe4a1f0c12a40bfa8274fe6d10d9274724e957f 100644
--- a/gemfiles/Gemfile.rails3.2
+++ b/gemfiles/Gemfile.rails3.2
@@ -27,7 +27,7 @@ group :test do
 
   platforms :ruby do
     gem 'pg'
-    gem 'mysql2', ~> '0.3.11'
+    gem 'mysql2', '~> 0.3.11'
   end
 
   platforms :jruby do
diff --git a/gemfiles/Gemfile.rails4.1 b/gemfiles/Gemfile.rails4.1
index e562a923c9f2c64729fd56919c7370c229623285..a9459d6020e75d931dd7c4487e8aa4055a8ae6b3 100644
--- a/gemfiles/Gemfile.rails4.1
+++ b/gemfiles/Gemfile.rails4.1
@@ -27,7 +27,7 @@ group :test do
 
   platforms :ruby do
     gem 'pg'
-    gem 'mysql2', ~> '0.3.11'
+    gem 'mysql2', '~> 0.3.11'
   end
 
   platforms :jruby do
diff --git a/gemfiles/Gemfile.ruby1.9.3 b/gemfiles/Gemfile.ruby1.9.3
index ed62da6ffc7cf8531cc00a0b44a71366dcb2a8ba..dc56f6f02d1fccad7551f54628b360169112d172 100644
--- a/gemfiles/Gemfile.ruby1.9.3
+++ b/gemfiles/Gemfile.ruby1.9.3
@@ -9,7 +9,7 @@ group :development, :test do
   gem 'rails'
   gem 'sqlite3'
   gem 'pg'
-  gem 'mysql2', ~> '0.3.11'
+  gem 'mysql2', '~> 0.3.11'
 
   # i18n gem >=0.7.0 does not work with Ruby 1.9.2
   gem 'i18n', '0.6.1'