diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 64b22a8..72c4376 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -20,5 +20,6 @@ jobs:
         run: poetry install
       - name: Static type checking
         run: poetry run mypy .
+        if: runner.os != 'Windows'
       - name: Run test
         run: poetry run pytest