diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
index 6ffccd6..f924bf9 100644
--- a/.github/workflows/build.yaml
+++ b/.github/workflows/build.yaml
@@ -10,7 +10,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        python-version: [3.6, 3.7, 3.8, 3.9]
+        python-version: [3.6.8, 3.7, 3.8, 3.9]
         os: [macos-latest, ubuntu-latest]
     
     steps: