diff --git a/.github/workflows/code-coverage.yml b/.github/workflows/code-coverage.yml
index ba8270e..f15c891 100644
--- a/.github/workflows/code-coverage.yml
+++ b/.github/workflows/code-coverage.yml
@@ -1,6 +1,10 @@
 name: Upload CodeCov Report
 
-on: [ push, pull_request ]
+on:
+  pull_request_target:
+    branches:
+      - master
+      - cpp20
 
 jobs:
   build: