diff --git a/lib/plugins/open_id_authentication/init.rb b/lib/plugins/open_id_authentication/init.rb
index e276bc873..ec96a5a7f 100644
--- a/lib/plugins/open_id_authentication/init.rb
+++ b/lib/plugins/open_id_authentication/init.rb
@@ -1,9 +1,5 @@
 # frozen_string_literal: false
 
-if Rails.version < '3'
-  config.gem 'rack-openid', :lib => 'rack/openid', :version => '>=0.2.1'
-end
-
 require 'open_id_authentication'
 
 config.middleware.use OpenIdAuthentication