diff --git a/.github/workflows/cov-op-historical-proof.yml b/.github/workflows/cov-op-historical-proof.yml
index 3c15702fece..ff987dd1f5d 100644
--- a/.github/workflows/cov-op-historical-proof.yml
+++ b/.github/workflows/cov-op-historical-proof.yml
@@ -1,9 +1,7 @@
 name: coverage-op-historical-proof
 
 on:
-  push:
-    branches: [ unstable, main ]
-  pull_request:
+  merge_group:
   workflow_dispatch:
 
 jobs: