diff --git a/emacs/.emacs.d/config/init-js.el b/emacs/.emacs.d/config/init-js.el
index ba8ee39..c0c9d83 100644
--- a/emacs/.emacs.d/config/init-js.el
+++ b/emacs/.emacs.d/config/init-js.el
@@ -34,6 +34,8 @@
                "C-c M-z" #'js-send-buffer-and-go))
 
 (use-package typescript-mode
+  :mode ("\\.ts\\'"
+         "\\.mjs\\'")
   :custom
   (typescript-indent-level 2))
 
diff --git a/emacs/.emacs.d/config/init-markdown.el b/emacs/.emacs.d/config/init-markdown.el
index e3f9507..6c80e41 100644
--- a/emacs/.emacs.d/config/init-markdown.el
+++ b/emacs/.emacs.d/config/init-markdown.el
@@ -2,7 +2,8 @@
 
 (use-package markdown-mode
   :mode (("\\.md\\'" . gfm-mode)
-         ("\\.markdown\\'" . gfm-mode))
+         ("\\.markdown\\'" . gfm-mode)
+         ("\\.mdx\\'" . gfm-mode))
   :custom
   (markdown-fontify-code-blocks-natively t))