diff --git a/.emacs.d/init.el b/.emacs.d/init.el
index 2ecdb98..5f228f6 100644
--- a/.emacs.d/init.el
+++ b/.emacs.d/init.el
@@ -197,6 +197,21 @@
   (add-hook 'prog-mode-hook
             #'(lambda () (setq-local show-trailing-whitespace t))))
 
+(use-package graphviz-dot-mode
+  :config
+  ; don't auto-newline on semicolon
+  (defun electric-graphviz-dot-semi ()
+    "Terminate line and indent next line."
+    (interactive)
+    (insert ";")
+    (if (and graphviz-dot-auto-indent-on-semi
+             (not (graphviz-dot-comment-or-string-p)))
+        (save-excursion
+          (beginning-of-line)
+          (skip-chars-forward " \t")
+          (graphviz-dot-indent-line))
+      (delete-horizontal-space))))
+
 ;;;; external packages (required)
 (use-package company :ensure
   :config