diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 8b9a3f4704..99c3d16d3e 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
-        fetch-depth: 0
+        fetch-depth: '0'
       - uses: actions/setup-python@v2
         with:
           python-version: 3.x