diff --git a/.emacs.d/modes.el b/.emacs.d/modes.el
index 3e12467..5e9d6ea 100644
--- a/.emacs.d/modes.el
+++ b/.emacs.d/modes.el
@@ -14,6 +14,8 @@
 ;; MarkDown
 (autoload 'markdown-mode "markdown-mode.el" "Markdown mode." t)
 (setq auto-mode-alist (cons '("\.markdown$" . markdown-mode) auto-mode-alist))
+(setq auto-mode-alist (cons '("\.mdwn$" . markdown-mode) auto-mode-alist))
+(setq auto-mode-alist (cons '("\.mdt$" . markdown-mode) auto-mode-alist))
 (setq auto-mode-alist (cons '("\.md$" . markdown-mode) auto-mode-alist))
 
 ;; JSON