diff --git a/Gemfile b/Gemfile
index 096ed59..8dfdf74 100644
--- a/Gemfile
+++ b/Gemfile
@@ -30,7 +30,7 @@ else
     gem 'actionpack'
   end
 end
-gem 'mysql2', '~> 0.4.4'
+gem 'mysql2', '~> 0.5.2'
 
 group :test do
   # TestUnit was removed from Ruby 2.2 but still needed for testing Rails 3.x.