diff --git a/.github/workflows/checks.yml b/.github/workflows/checks.yml
index 5d90f0a..73135c7 100644
--- a/.github/workflows/checks.yml
+++ b/.github/workflows/checks.yml
@@ -14,7 +14,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: psf/black@24.8.0
         with:
-          src: "./iso-datetime-utc"
+          src: "./iso_datetime_utc"
       - uses: chartboost/ruff-action@v1
         with:
           version: 0.3.4