diff --git a/Dockerfile b/Dockerfile
index f7db7114f..9ede21298 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 # python 3
-FROM ubuntu:jammy
+FROM ubuntu:jammy-20231004
 
 MAINTAINER K. Shankari (shankari@eecs.berkeley.edu)
 
@@ -16,8 +16,6 @@ RUN apt-get install -y -qq wget
 # install jq to parse json within bash scripts
 RUN apt-get install -y jq
 
-RUN apt-get -y -qq update && apt-get -y -qq upgrade
-
 # cleanup
 RUN apt-get -y remove --purge build-essential
 RUN apt-get clean && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*