diff --git a/src/posts/0014-change-emacs-theme-automatically/index.org b/src/posts/0014-change-emacs-theme-automatically/index.org
index 099c868..73cd685 100644
--- a/src/posts/0014-change-emacs-theme-automatically/index.org
+++ b/src/posts/0014-change-emacs-theme-automatically/index.org
@@ -11,3 +11,4 @@ the hour.
 There are two possibilities.
 One would be to sync with the sun using the current location.
 There is an emacs package for that.
+It's called [[https://github.com/hadronzoo/theme-changer][theme-changer]]