diff --git a/.github/workflows/validate_markdown.yml b/.github/workflows/validate_markdown.yml
index a51196e..86dda6b 100644
--- a/.github/workflows/validate_markdown.yml
+++ b/.github/workflows/validate_markdown.yml
@@ -43,5 +43,4 @@ jobs:
       with:
         check-modified-files-only: yes
         config-file: '.rules/mlc_config.json'
-
-
+        base-branch: 'main'