diff --git a/.github/workflows/groundwire-verify.yml b/.github/workflows/groundwire-verify.yml
index b0b65a3..f924cc4 100644
--- a/.github/workflows/groundwire-verify.yml
+++ b/.github/workflows/groundwire-verify.yml
@@ -2,6 +2,7 @@ name: Groundwire PR Verification
 
 on:
   pull_request:
+    branches: [master]
     types: [opened, synchronize, reopened]
 
 permissions: