diff --git a/_config.yml b/_config.yml
index 4f9ff0d..45ae5ef 100644
--- a/_config.yml
+++ b/_config.yml
@@ -147,7 +147,9 @@ defaults:
       toc: true # Display TOC column in posts.
       # DO NOT modify the following parameter unless you are confident enough
       # to update the code of all other post links in this project.
-      permalink: /posts/:title/
+      # permalink: /posts/:title/
+      # 2023.7.12: fixed permalink to support links between posts
+      permalink: /posts/:categories/:name
   - scope:
       path: _drafts
     values: