diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index df89d38..2e2b10f 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -19,9 +19,9 @@ jobs:
     strategy:
       matrix:
         platform: [ubuntu-latest, macos-latest] # TODO windows-latest??
-        python-version: ['3.6', '3.7', '3.8']
+        python-version: [3.6, 3.7, 3.8]
         # seems like 3.6 isn't available on their osx image anymore
-        exclude: [{platform: macos-latest, python-version: '3.6'}]
+        exclude: [{platform: macos-latest, python-version: 3.6}]
 
     runs-on: ${{ matrix.platform }}