diff --git a/.github/workflows/compressed-size.yml b/.github/workflows/compressed-size.yml
index a838ba4e1f..9ff09af23f 100644
--- a/.github/workflows/compressed-size.yml
+++ b/.github/workflows/compressed-size.yml
@@ -1,6 +1,9 @@
 name: Compressed Size
 
-on: [pull_request]
+on:
+  pull_request_target:
+    branches:
+      - master
 
 jobs:
   build: