diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 83c4e8d..a7a9d62 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -4,13 +4,14 @@ on: [push, pull_request]
 
 jobs:
   build:
-    runs-on: ubuntu-latest
 
     strategy:
       matrix:
-        python-version: [ '3.6', '3.7', '3.8', 'pypy3' ]
+        os: ['ubuntu-latest', 'windows-latest']
+        python-version: [ '3.7', '3.8' ]
         
-    name: Python ${{ matrix.python-version }}
+    runs-on: ${{ matrix.os }}
+    name: OS ${{ matrix.os }}, Python ${{ matrix.python-version }}
 
     steps:
       # Checks out a copy of your repository on the machine