diff --git a/.github/workflows/build-test.yaml b/.github/workflows/build-test.yaml
index 4b53527..31b7ab5 100644
--- a/.github/workflows/build-test.yaml
+++ b/.github/workflows/build-test.yaml
@@ -25,7 +25,7 @@ jobs:
           - ubuntu-latest
         python-version:
           - '3.8'
-          - '3.10'
+          - '3.9'
 
     runs-on: ${{ matrix.os }}