diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 6692c1e802678..374c547dfa562 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -14,6 +14,8 @@ jobs:
 
     steps:
     - uses: actions/checkout@v3
+      with:
+        ref: 6.5.4
     - name: move config
       run: cp config-um .config
     - name: make