diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 1cb6764..805398d 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -20,8 +20,8 @@ jobs:
     strategy:
       matrix:
         developer_dir:
-          - /Applications/Xcode_15.4.app/Contents/Developer
-          - /Applications/Xcode_16_0.app/Contents/Developer
+          - "/Applications/Xcode_15.4.app/Contents/Developer"
+          - "/Applications/Xcode_16.0.app/Contents/Developer"
     steps:
       - uses: actions/checkout@v4
       - name: Test