diff --git a/.github/workflows/milestone_assign.yml b/.github/workflows/milestone_assign.yml
index c5a231e59e..4b52dfc30d 100644
--- a/.github/workflows/milestone_assign.yml
+++ b/.github/workflows/milestone_assign.yml
@@ -2,7 +2,7 @@ name: Milestone - assign to PRs
 
 on:
   pull_request_target:
-    types: [opened, reopened, edited, synchronize]
+    types: [closed]
 
 jobs:
   run_if_release: