diff --git a/config/initializers/mime_types.rb b/config/initializers/mime_types.rb
index 8f8bef42be..ca58ae92d1 100644
--- a/config/initializers/mime_types.rb
+++ b/config/initializers/mime_types.rb
@@ -6,3 +6,5 @@
 
 Mime::Type.register_alias "text/plain", :diff
 Mime::Type.register_alias "text/plain", :patch
+Mime::Type.register_alias 'text/html',  :markdown
+Mime::Type.register_alias 'text/html',  :md