diff --git a/.github/workflows/cleanup-caches.yml b/.github/workflows/cleanup-caches.yml
index 7f6c20a92..8db42bb09 100644
--- a/.github/workflows/cleanup-caches.yml
+++ b/.github/workflows/cleanup-caches.yml
@@ -1,6 +1,6 @@
 name: souji
 on:
-  pull_request:
+  pull_request_target:
     types:
       - closed
   delete: