diff --git a/lib/simple_datatables.rb b/lib/simple_datatables.rb
index 7ca7bc7..f39b3ae 100644
--- a/lib/simple_datatables.rb
+++ b/lib/simple_datatables.rb
@@ -1,6 +1,6 @@
 require 'rails'
 
-Mime::Type.register "application/json", :datatables
+Mime::Type.register_alias "application/json", :datatables
 
 module SimpleDatatables
   module Rails