diff --git a/after/ftdetect/markdown.vim b/after/ftdetect/markdown.vim
index 17ef121..9fb320a 100644
--- a/after/ftdetect/markdown.vim
+++ b/after/ftdetect/markdown.vim
@@ -1,2 +1,3 @@
 " Force *.md to markdown filetype
 au BufNewFile,BufReadPost *.md set filetype=markdown
+au BufNewFile,BufReadPost *.ronn set filetype=markdown