diff --git a/vendor/gems/discourse_emoji/Gemfile b/vendor/gems/discourse_emoji/Gemfile
index fcb7fdc29..9a7bd2966 100644
--- a/vendor/gems/discourse_emoji/Gemfile
+++ b/vendor/gems/discourse_emoji/Gemfile
@@ -1,7 +1,7 @@
 source 'https://rubygems.org'
 
 group :test do
-  gem 'rails'  
+  gem 'rails'  , '>= 5.0.0'
   gem 'rspec'  
   gem 'mocha'
 end