diff --git a/.github/workflows/ersem.yml b/.github/workflows/ersem.yml
index 783c381e..267dacd6 100644
--- a/.github/workflows/ersem.yml
+++ b/.github/workflows/ersem.yml
@@ -6,7 +6,7 @@ on:
   push:
     branches: [ master ]
   pull_request:
-    branches: [ master ]
+    types: [opened, synchronize, reopened]  
   schedule:
     - cron: '0 9 * * 1'
 jobs: