diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 91e305f..9ec546c 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -45,7 +45,7 @@ jobs:
     - name: Set up Python
       uses: actions/setup-python@v3
       with:
-        python-version: '3.6'
+        python-version: '3.6.15'
     - name: Install dependencies and environment
       run: |
         make pipenv