diff --git a/.github/workflows/nightly.yml b/.github/workflows/nightly.yml
index bfb90bdc..c88a35e0 100644
--- a/.github/workflows/nightly.yml
+++ b/.github/workflows/nightly.yml
@@ -14,6 +14,7 @@ on:
 jobs:
   release:
     name: release
+    if: ${{ github.ref == 'refs/heads/main' }}
     runs-on: ubuntu-latest
     permissions:
       actions: write