diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 2e54717..17e4d48 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -21,7 +21,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, windows-latest, macos-latest]
-        python-version: ['3.6', '3.7', '3.8']
+        python-version: ['3.6', '3.7', '3.8', '3.9']
     steps:
       - uses: actions/checkout@v2
       - name: Setup Python