diff --git a/Dockerfile b/Dockerfile
index 58681c2..9d93159 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM python:3.10-buster
+FROM python:3.9-buster
 
 ENV PYTHONUNBUFFERED=1 \
     POETRY_VERSION=1.1.12 \