diff --git a/.github/workflows/psm-interop.yaml b/.github/workflows/psm-interop.yaml
index 49c27fc6..259b1a31 100644
--- a/.github/workflows/psm-interop.yaml
+++ b/.github/workflows/psm-interop.yaml
@@ -4,7 +4,7 @@ on:
   pull_request:
   push:
     branches:
-      - master
+      - main
 
 permissions:
   contents: read