diff --git a/.github/workflows/ubuntu20_python.yml b/.github/workflows/ubuntu20_python.yml
index 8c0175a..c107ffa 100644
--- a/.github/workflows/ubuntu20_python.yml
+++ b/.github/workflows/ubuntu20_python.yml
@@ -16,7 +16,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.9", "3.10", "3.12"]
+        python-version: ["3.9", "3.10", "3.7"]
 
     steps:
     - uses: actions/checkout@v3