diff --git a/src/templates/nodes/custom/comment/list_embed_base.pug b/src/templates/nodes/custom/comment/list_embed_base.pug
index 1e42e7c8..143faa7a 100644
--- a/src/templates/nodes/custom/comment/list_embed_base.pug
+++ b/src/templates/nodes/custom/comment/list_embed_base.pug
@@ -39,7 +39,7 @@
 						a(
 							title="{{ _('Handy guide of Markdown syntax') }}",
 							target="_blank",
-							href="https://guides.github.com/features/mastering-markdown/")
+							href="http://commonmark.org/help/")
 							span {{ _('markdown cheatsheet') }}
 			| {% endblock can_post_comment %}