diff --git a/.github/workflows/python-package.yml b/.github/workflows/python-package.yml
index 6d5953b..2c99e8b 100644
--- a/.github/workflows/python-package.yml
+++ b/.github/workflows/python-package.yml
@@ -16,7 +16,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [3.6]
+        python-version: [3.6.15]
 
     steps:
     - uses: actions/checkout@v2