diff --git a/Gemfile b/Gemfile
index c38b7a4..125e4df 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,4 +1,5 @@
 source 'http://rubygems.org'
+ruby '1.9.3'
 
 gem 'rails', '~> 3.2.0'