diff --git a/.emacs.d/init.el b/.emacs.d/init.el
index 65db5d6..90b6ff4 100644
--- a/.emacs.d/init.el
+++ b/.emacs.d/init.el
@@ -303,6 +303,11 @@
   (setq ns-command-modifier 'hyper)
   (server-start))
 
+(use-package yaml-mode
+  :config
+  (add-hook 'yaml-mode-hook
+            #'(lambda () (setq-local show-trailing-whitespace t))))
+
 ;;;; external packages (required)
 (use-package delight :ensure :demand)