diff --git a/.github/workflows/wheels.yml b/.github/workflows/wheels.yml
index 61fe2ea67c..39bf89ad79 100644
--- a/.github/workflows/wheels.yml
+++ b/.github/workflows/wheels.yml
@@ -12,7 +12,7 @@ permissions:
 jobs:
   build-wheels:
     if: "!startsWith(github.ref, 'refs/tags/C_')"
-    uses: tskit-dev/.github/.github/workflows/build-wheels.yml@v19
+    uses: tskit-dev/.github/.github/workflows/build-wheels.yml@v21
     with:
       pyproject-directory: python