diff --git a/.github/workflows/testpackage.yml b/.github/workflows/testpackage.yml
index 1603b3a..edcf02b 100644
--- a/.github/workflows/testpackage.yml
+++ b/.github/workflows/testpackage.yml
@@ -48,7 +48,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-18.04, windows-latest, macos-latest]
-        python-version: [3.6, 3.7, 3.8]
+        python-version: [3.6, 3.7, 3.8, 3.9]
 
     runs-on: ${{ matrix.os }}