diff --git a/.github/workflows/python-package.yml b/.github/workflows/python-package.yml
index 76c784b..25863d4 100644
--- a/.github/workflows/python-package.yml
+++ b/.github/workflows/python-package.yml
@@ -16,7 +16,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: "3.5"
+        python-version: ["3.5"]
 
     steps:
     - uses: actions/checkout@v2