diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 2d1df9a05..953cd6c07 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -365,7 +365,7 @@ jobs:
     - name: Set up Python
       uses: actions/setup-python@v5
       with:
-        python-version: "3.11"
+        python-version: "3.9"
 
     - name: Cache_dependencies
       uses: actions/cache@v3