diff --git a/.github/workflows/dependabot-auto-merge.yml b/.github/workflows/dependabot-auto-merge.yml
index c783c7e4..e442919d 100644
--- a/.github/workflows/dependabot-auto-merge.yml
+++ b/.github/workflows/dependabot-auto-merge.yml
@@ -1,9 +1,9 @@
 name: Dependabot auto-merge
 
 on:  # yamllint disable-line rule:truthy
-  pull_request_target:
-    types:
-      - opened
+  pull_request:
+    branches:
+      - master
 
 permissions:
   contents: write