diff --git a/spark-qfs-swarm/jupyter-server/Dockerfile b/spark-qfs-swarm/jupyter-server/Dockerfile
index 497bafa..e891349 100644
--- a/spark-qfs-swarm/jupyter-server/Dockerfile
+++ b/spark-qfs-swarm/jupyter-server/Dockerfile
@@ -22,7 +22,6 @@ RUN jupyter nbextensions_configurator enable --user
 RUN jupyter nbextension enable toc2/main
 RUN jupyter nbextension enable codefolding/main
 RUN jupyter nbextension enable execute_time/ExecuteTime
-RUN jupyter nbextension enable code_prettify/code_prettify
 
 RUN mkdir -p /home/spark/jupyter/runtime \
  &&	mkdir -p /home/spark/jupyter/notebooks
diff --git a/spark-qfs-swarm/worker-node/Dockerfile b/spark-qfs-swarm/worker-node/Dockerfile
index acf1b99..51f9cb0 100644
--- a/spark-qfs-swarm/worker-node/Dockerfile
+++ b/spark-qfs-swarm/worker-node/Dockerfile
@@ -15,7 +15,7 @@ MAINTAINER Michael Kamprath "https://github.com/michaelkamprath"
 #	spark-master - the service where the spark master runs
 #
 
-ARG QFS_VERSION=2.2.0
+ARG QFS_VERSION=2.2.1
 ARG SPARK_VERSION=3.0.0
 ARG HADOOP_MINOR_VERSION=2.7
 ARG HADOOP_VERSION=2.7.2