diff --git a/.vim/vimrc b/.vim/vimrc
index 325d88a..7dbe046 100644
--- a/.vim/vimrc
+++ b/.vim/vimrc
@@ -101,6 +101,7 @@ au BufNewFile,BufRead *.html set shiftwidth=2
 au BufNewFile,BufRead *.js set shiftwidth=2
 au BufNewFile,BufRead *.sls set filetype=yaml
 au BufNewFile,BufRead *.sls set shiftwidth=2
+au BufNewFile,BufRead *.mjs set shiftwidth=2
 au BufNewFile,BufRead *.mk set noexpandtab
 au BufNewFile,BufRead *.psgi setf perl
 au BufNewFile,BufRead *.rb set shiftwidth=2