diff --git a/.github/workflows/validation.yml b/.github/workflows/validation.yml
index b102bd5..afa3f94 100644
--- a/.github/workflows/validation.yml
+++ b/.github/workflows/validation.yml
@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ["3.7"]
+        python-version: ["3.6", "3.7"]
 
     steps:
     - uses: actions/checkout@v2