diff --git a/gists.org b/gists.org
index f0e101f..284a1ff 100644
--- a/gists.org
+++ b/gists.org
@@ -151,11 +151,13 @@ My vertico-repeat setup.
 #+begin_src elisp :tangle gists/emacs-comments-do-what-i-actually-mean.el
   ;; Replace comment-dwim (M-;) with a modified version of
   ;; comment-or-uncomment-region. The modification is done by the crux
-  ;; package, which acts on a region if active otherwise on the current
-  ;; line.
+  ;; [1] package, which acts on a region if active otherwise on the
+  ;; current line.
   ;;
   ;; My personal preference goes to using straight.el-powered
   ;; use-package forms, even for built-in modules.
+  ;;
+  ;; [1] https://github.com/bbatsov/crux
 
   (use-package newcomment
     :straight (:type built-in)
diff --git a/gists/emacs-comments-do-what-i-actually-mean.el b/gists/emacs-comments-do-what-i-actually-mean.el
index d42f5c8..399336a 100644
--- a/gists/emacs-comments-do-what-i-actually-mean.el
+++ b/gists/emacs-comments-do-what-i-actually-mean.el
@@ -1,10 +1,12 @@
 ;; Replace comment-dwim (M-;) with a modified version of
 ;; comment-or-uncomment-region. The modification is done by the crux
-;; package, which acts on a region if active otherwise on the current
-;; line.
+;; [1] package, which acts on a region if active otherwise on the
+;; current line.
 ;;
 ;; My personal preference goes to using straight.el-powered
 ;; use-package forms, even for built-in modules.
+;;
+;; [1] https://github.com/bbatsov/crux
 
 (use-package newcomment
   :straight (:type built-in)