diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index a8eef6d..b631b63 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -19,10 +19,17 @@ jobs:
         version:
           - '1.9'
         os:
+          - macOS-latest
+          - windows-latest
           - ubuntu-latest
         arch:
           - x64
           - x86
+        exclude:
+          - os: macOS-latest
+            arch: x86
+          - os: ubuntu-latest
+            arch: x86
     steps:
       - uses: actions/checkout@v2
       - uses: julia-actions/setup-julia@v1