diff --git a/.github/workflows/mypy.yaml b/.github/workflows/mypy.yaml
index 12f89f6..8ffc108 100644
--- a/.github/workflows/mypy.yaml
+++ b/.github/workflows/mypy.yaml
@@ -1,6 +1,10 @@
 name: Python mypy
 
-on: [push, pull_request]
+on:
+  push:
+    branches:
+      - main
+  pull_request:
 
 jobs:
   static-analysis: