diff --git a/Dockerfile b/Dockerfile
index fe1da38..2ef8980 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM python:3.9
+FROM python:3.8
 WORKDIR /xqueue_fastapi
 COPY ./requirements.txt /xqueue_fastapi/requirements.txt
 RUN pip install uvicorn
diff --git a/requirements.txt b/requirements.txt
index a736c46..5744cd8 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -25,7 +25,7 @@ jedi==0.18.0
 Jinja2==3.0.1
 jsonschema==3.2.0
 jupyter==1.0.0
-jupyter-client==7.0.2
+jupyter-client==6.1.12
 jupyter-console==6.4.0
 jupyter-core==4.7.1
 jupyterlab-widgets==1.0.1