diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index adea60d..2a39e77 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -26,6 +26,11 @@ jobs:
     strategy:
       matrix:
         python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
+        os:
+          - ubuntu-latest
+          - macos-latest # arm64 (Apple Silicon)
+          - macos-13  # latest Intel release
+          - windows-latest
 
     steps:
       - uses: actions/checkout@v4