diff --git a/.ruby-version b/.ruby-version
index 5859406..b1b25a5 100644
--- a/.ruby-version
+++ b/.ruby-version
@@ -1 +1 @@
-2.2.3
+2.2.2
diff --git a/Gemfile b/Gemfile
index bb4de6a..0f43c32 100644
--- a/Gemfile
+++ b/Gemfile
@@ -64,3 +64,6 @@ group :development do
   gem 'capistrano-passenger'
 end
 
+group :development do
+  gem 'mysql2'
+end