diff --git a/Gemfile b/Gemfile
index 583f636..af0a135 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,5 +1,5 @@
 source 'https://rubygems.org/'
 
-gem 'spree_core', github: 'spree/spree', branch: '1-1-stable'
+gem 'spree_core', :github => 'spree/spree', :branch => '1-1-stable'
 
 gemspec