diff --git a/.github/workflows/mypy.yml b/.github/workflows/mypy.yml
index a83a90c69529f2..75264c8e746663 100644
--- a/.github/workflows/mypy.yml
+++ b/.github/workflows/mypy.yml
@@ -9,6 +9,7 @@ on:
     paths:
       - "Tools/clinic/**"
       - "Tools/cases_generator/**"
+      - "Tools/requirements-dev.txt"
       - ".github/workflows/mypy.yml"
   workflow_dispatch: