diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index f675810..2701911 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -12,7 +12,7 @@ jobs:
       max-parallel: 2
       matrix:
         platform: [ ubuntu-latest, macos-latest, windows-latest ]
-        python-version: [ '3.6', '3.10' ]
+        python-version: [ '3.6', '3.9' ]
         tasks: [ test ]
     steps:
     - uses: actions/checkout@v2