diff --git a/Gemfile b/Gemfile
index 56ea6ef..451dba6 100644
--- a/Gemfile
+++ b/Gemfile
@@ -56,6 +56,10 @@ group :development, :test, :mysql do
   gem "test-unit"
 end
 
+group :openshift do
+  gem "pg"
+end
+
 group :mysql do
   gem "mysql2"
 end