diff --git a/.config/emacs/init.el b/.config/emacs/init.el
index 419efd6..12bb147 100644
--- a/.config/emacs/init.el
+++ b/.config/emacs/init.el
@@ -64,6 +64,7 @@
   (dired-subtree-use-backgrounds nil))
 
 (use-package undo-tree
+  :ensure (:repo "https://gitlab.com/tsc25/undo-tree")
   :init (global-undo-tree-mode)
   :custom
   (undo-tree-history-directory-alist '(("." . "~/.config/emacs/undo-tree"))))