diff --git a/.github/workflows/black.yml b/.github/workflows/black.yml
index d954264d..5b3c345d 100644
--- a/.github/workflows/black.yml
+++ b/.github/workflows/black.yml
@@ -1,5 +1,10 @@
 name: Black
-on: [push]
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
 
 jobs:
   black: