diff --git a/Dockerfile b/Dockerfile
index eae6dc1..88567d3 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 #FROM ubuntu:20.04 
-FROM python:buster
+FROM python:bullseye
 
 MAINTAINER Walt Howd <walthowd@gmail.com>
 
@@ -11,7 +11,7 @@ WORKDIR /tmp/silabs
 RUN apt-get update \
   && apt-get install -y git wget python3-pip unzip jq curl
 
-RUN pip3 install --upgrade git+git://github.com/zigpy/bellows.git
+RUN pip3 install --upgrade git+https://github.com/zigpy/bellows.git
 
 RUN pip3 install pyserial xmodem