diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index e385df71..a9702e71 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -70,6 +70,6 @@ jobs:
     steps:
       - uses: shogo82148/actions-setup-perl@v1.31.3
         with:
-          perl-version: 5.40
+          perl-version: "5.40"
       - uses: actions/checkout@v4
       - run: ./test-e2e/run.zsh