diff --git a/.github/workflows/post-release.yml b/.github/workflows/post-release.yml
index 2ea46fbc7..867031256 100644
--- a/.github/workflows/post-release.yml
+++ b/.github/workflows/post-release.yml
@@ -24,7 +24,7 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
         with:
-          ref: ${{ github.event.inputs.ref }}
+          ref: ${{ inputs.ref }}
       - name: Install Python
         uses: actions/setup-python@v4
         with: