diff --git a/Dockerfile b/Dockerfile
index 05f2b99..2eaf23f 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 # syntax=docker/dockerfile:1
-FROM docker.io/python:3.8.12-slim-bullseye
+FROM docker.io/python:3.10.5-slim-bullseye
 COPY . /halfapi
 WORKDIR /halfapi
 RUN apt-get update > /dev/null && apt-get -y install git > /dev/null
diff --git a/halfapi/__init__.py b/halfapi/__init__.py
index e3db8e3..a362c75 100644
--- a/halfapi/__init__.py
+++ b/halfapi/__init__.py
@@ -1,5 +1,5 @@
 #!/usr/bin/env python3
-__version__ = '0.6.20'
+__version__ = '0.6.21-rc0'
 
 def version():
     return f'HalfAPI version:{__version__}'