diff --git a/.github/workflows/mypy.yml b/.github/workflows/mypy.yml
index c3aa86e..27b618d 100644
--- a/.github/workflows/mypy.yml
+++ b/.github/workflows/mypy.yml
@@ -1,6 +1,6 @@
 name: Type checking
 
-on: [push]
+on: [push, pull_request]
 
 jobs:
   build: