diff --git a/Dockerfile b/Dockerfile
index 601eeca..f35a445 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,15 +1,15 @@
 #
 # Spark Standalone Container
-# Apache Spark 3.3.0
+# Apache Spark 3.5.0
 #
 # Runs a super-tiny, Spark standalone cluster in a container
 # Suitable for building test/development containers for spark apps
 #
 # Usage:
-# $ docker build -t uncharted/sparklet:3.3.0 .
-# $ docker run -p 8080:8080 -it uncharted/sparklet:3.3.0
+# $ docker build -t uncharted/sparklet:3.5.0 .
+# $ docker run -p 8080:8080 -it uncharted/sparklet:3.5.0
 
-# Ubuntu 22.04 (focal)
+# Ubuntu 22.04 (jammy)
 # https://hub.docker.com/_/ubuntu/?tab=tags&name=jammy
 ARG ROOT_CONTAINER=ubuntu:jammy
 
@@ -17,9 +17,9 @@ FROM $ROOT_CONTAINER
 
 LABEL author="Sean McIntyre <smcintyre@uncharted.software>"
 
-ARG spark_version="3.3.0"
+ARG spark_version="3.5.0"
 ARG hadoop_version="3"
-ARG spark_checksum="1e8234d0c1d2ab4462d6b0dfe5b54f2851dcd883378e0ed756140e10adfb5be4123961b521140f580e364c239872ea5a9f813a20b73c69cb6d4e95da2575c29c"
+ARG spark_checksum="8883c67e0a138069e597f3e7d4edbbd5c3a565d50b28644aad02856a1ec1da7cb92b8f80454ca427118f69459ea326eaa073cf7b1a860c3b796f4b07c2101319"
 ARG openjdk_version="17"
 
 ENV APACHE_SPARK_VERSION="${spark_version}" \
@@ -50,15 +50,15 @@ WORKDIR /opt
 
 RUN apt-get update --yes && \
     # grab curl and ssh
-    apt-get install --yes openssh-client vim curl procps && \
+    apt-get install --yes openssh-client vim curl procps xz-utils && \
     # generate a keypair and authorize it
     mkdir -p /root/.ssh && \
     ssh-keygen -f /root/.ssh/id_rsa -N "" && \
     cat /root/.ssh/id_rsa.pub > /root/.ssh/authorized_keys && \
     # s6 overlay
-    curl -LS https://github.com/just-containers/s6-overlay/releases/download/v2.2.0.3/s6-overlay-amd64.tar.gz -o /tmp/s6-overlay.tar.gz && \
-    tar xvfz /tmp/s6-overlay.tar.gz -C / && \
-    rm -f /tmp/s6-overlay.tar.gz
+    curl -LS https://github.com/just-containers/s6-overlay/releases/download/v3.1.6.2/s6-overlay-x86_64.tar.xz -o /tmp/s6-overlay.tar.xz && \
+    tar xvf /tmp/s6-overlay.tar.xz -C / && \
+    rm -f /tmp/s6-overlay.tar.xz
 
 # upload init scripts
 ADD services/spark-master-run /etc/services.d/spark-master/run
@@ -67,5 +67,4 @@ ADD services/spark-slave2-run /etc/services.d/spark-slave2/run
 
 ENV PATH "/opt/spark-${APACHE_SPARK_VERSION}-bin-hadoop${HADOOP_VERSION}/bin":$PATH
 
-ENTRYPOINT [ "/init" ]
 CMD ["spark-shell"]
\ No newline at end of file