diff --git a/blog.config.js b/blog.config.js
index 5cebfefa..3659b6fb 100644
--- a/blog.config.js
+++ b/blog.config.js
@@ -37,7 +37,7 @@ const BLOG = {
 
   COMMENT_UTTERRANCES_REPO: process.env.NEXT_PUBLIC_COMMENT_UTTERRANCES_REPO || '', // e.g 'tangly1024/NotionNext' see https://utteranc.es/
 
-  COMMENT_GITALK_REPO: process.env.NEXT_PUBLIC_COMMENT_GITALK_REPO || '', // e.g NotionNext
+  COMMENT_GITALK_REPO: process.env.NEXT_PUBLIC_COMMENT_GITALK_REPO || '', // e.g NotionNext see https://gitalk.github.io/
   COMMENT_GITALK_OWNER: process.env.NEXT_PUBLIC_COMMENT_GITALK_OWNER || '', // e.g tangly1024
   COMMENT_GITALK_ADMIN: process.env.NEXT_PUBLIC_COMMENT_GITALK_ADMIN || '', // e.g 'tangly1024'
   COMMENT_GITALK_CLIENT_ID: process.env.NEXT_PUBLIC_COMMENT_GITALK_CLIENT_ID || '', // e.g 20位ID