diff --git a/.github/workflows/web.yml b/.github/workflows/web.yml
index 4113c40d..48af6b9b 100644
--- a/.github/workflows/web.yml
+++ b/.github/workflows/web.yml
@@ -32,7 +32,7 @@ jobs:
 
       - uses: actions/setup-python@v4
         with:
-          python-version: 3.11.8
+          python-version: 3.9.19
           cache: 'pip'
 
       - run: pip install -r web/requirements-dev.txt
diff --git a/docker/pytest/Dockerfile b/docker/pytest/Dockerfile
index e3dfbd4b..858a6902 100644
--- a/docker/pytest/Dockerfile
+++ b/docker/pytest/Dockerfile
@@ -1,4 +1,4 @@
-FROM python:3.11-slim
+FROM python:3.9-slim
 ENV DOCKER=1
 
 WORKDIR /src