diff --git a/.gitmodules b/.gitmodules
index b2d88b9..a9ad053 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -211,3 +211,6 @@
 [submodule "site-lisp/cond-let"]
 	path = site-lisp/cond-let
 	url = https://github.com/tarsius/cond-let.git
+[submodule "site-lisp/crontab-mode"]
+	path = site-lisp/crontab-mode
+	url = https://github.com/emacs-pe/crontab-mode.git
diff --git a/lisp/init-file.el b/lisp/init-file.el
index cf32b15..791eaa2 100644
--- a/lisp/init-file.el
+++ b/lisp/init-file.el
@@ -10,6 +10,7 @@
 (add-pkg-in-pkg-dir "saveplace-pdf-view")
 (add-pkg-in-pkg-dir "graphviz-dot-mode")
 (add-pkg-in-pkg-dir "meson-mode")
+(add-pkg-in-pkg-dir "crontab-mode")
 
 
 (autoload 'vimrc-mode "vimrc-mode" "" t)
@@ -88,6 +89,12 @@
  '("/meson\\(\\.build\\|_options\\.txt\\|\\.options\\)\\'" . meson-mode))
 
 
+(autoload 'crontab-mode "crontab-mode" "" t)
+(add-to-list
+ 'auto-mode-alist
+ '("/crontab\\(\\.X*[[:alnum:]]+\\)?\\'" . crontab-mode))
+
+
 ;; optimize performance of long-line files
 (setq-default bidi-display-reordering t)
 (setq bidi-inhibit-bpa t
diff --git a/site-lisp/crontab-mode b/site-lisp/crontab-mode
new file mode 160000
index 0000000..7412f3d
--- /dev/null
+++ b/site-lisp/crontab-mode
@@ -0,0 +1 @@
+Subproject commit 7412f3df0958812bfcacd5875a409fa795fa8ecc