diff --git a/.github/workflows/spotbugs.yml b/.github/workflows/spotbugs.yml
index 1f6d7646dab..0f47965300d 100644
--- a/.github/workflows/spotbugs.yml
+++ b/.github/workflows/spotbugs.yml
@@ -1,5 +1,12 @@
 name: Spotbugs
-on: [push]
+
+on:
+  push:
+    branches:
+      - master
+  pull_request_target:
+    branches:
+      - master
 
 jobs:
   build: