diff --git a/Dockerfile b/Dockerfile
index d754f4a..0a68229 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -14,7 +14,7 @@ RUN date +'%Y-%m-%d %H:%M %Z' > /build-date
 ##############################################
 # Main image
 ##############################################
-FROM python:3.11.0-slim-bullseye AS final
+FROM python:3.11.1-slim-bullseye AS final
 
 ARG DEBIAN_FRONTEND=noninteractive
 
diff --git a/README.md b/README.md
index d418a03..4b98af8 100644
--- a/README.md
+++ b/README.md
@@ -3,7 +3,7 @@
 ## Quick start
 Clone, then
 ```shell
-pyenv virtualenv 3.10.7 charasheet
+pyenv virtualenv 3.11.1 charasheet
 pyenv local charasheet
 pip install pip-tools
 pip-sync requirements.txt requirements-dev.txt