diff --git a/website/Gemfile b/website/Gemfile
index 728c73335..b0fa33b36 100644
--- a/website/Gemfile
+++ b/website/Gemfile
@@ -1,4 +1,5 @@
 source 'https://rubygems.org'
+ruby "1.9.3"
 
 gem "less", "~> 2.2.2"
 gem "middleman", "~> 3.0.6"