diff --git a/.github/workflows/format.yml b/.github/workflows/format.yml
index ca6a5f014..c18c75d68 100644
--- a/.github/workflows/format.yml
+++ b/.github/workflows/format.yml
@@ -22,4 +22,4 @@ jobs:
         uses: jrouly/scalafmt-native-action@v2
         with:
           version: '3.7.11'
-          arguments: '--list --mode diff-ref=origin/main'
+          arguments: '--list --mode diff-ref=origin/1.0.x'