diff --git a/pipelines/full-build.yaml b/pipelines/full-build.yaml
index e3cc02b..c362d62 100644
--- a/pipelines/full-build.yaml
+++ b/pipelines/full-build.yaml
@@ -72,7 +72,7 @@ stages:
           - task: UsePythonVersion@0
             displayName: Set python version
             inputs:
-              versionSpec: 3.9
+              versionSpec: 3.11
           - script: |
               set -ex  # Echo commands before they are run
 
diff --git a/root-image/common.Dockerfile b/root-image/common.Dockerfile
index bc464b8..f6bc9ab 100644
--- a/root-image/common.Dockerfile
+++ b/root-image/common.Dockerfile
@@ -1,12 +1,9 @@
-FROM python:3.9-slim-buster AS base
+FROM python:3.11-slim-bookworm AS base
 
 # Upgrade dist packages
 RUN apt-get update && apt-get -yy upgrade && rm -rf /var/lib/apt/lists/*
 
 # Get required apt packages
 RUN apt-get update \
-  && apt-get install -yy libffi6 libfuzzy2 libmagic1 \
+  && apt-get install -yy libffi8 libfuzzy2 libmagic1 \
   && rm -rf /var/lib/apt/lists/*
-
-# Patch Python 3.9 for FIPS - https://github.com/python/cpython/issues/95231 (Not necessary for Python 3.10+)
-RUN sed -i -e 's/if e.errno == errno.EINVAL:/if e.errno in {errno.EINVAL, errno.EPERM, errno.ENOSYS}:/g' /usr/local/lib/python3.9/crypt.py