diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 35be5e7..4f3d989 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -18,8 +18,8 @@ jobs:
     
     strategy:
       matrix:
-        os: [ubuntu-latest]  # [windows-latest, macos-latest, ubuntu-latest]
-        python-version: [3.8]  # [3.8, 3.7, 3.6]
+        os: [windows-latest, macos-latest, ubuntu-latest]
+        python-version: [3.8, 3.7, 3.6]
 
     steps:
       - uses: actions/checkout@v2