diff --git a/datascience-notebook/Dockerfile b/datascience-notebook/Dockerfile
index c2b2eac8..ec25ab48 100644
--- a/datascience-notebook/Dockerfile
+++ b/datascience-notebook/Dockerfile
@@ -14,9 +14,9 @@ USER root
 # Default values can be overridden at build time
 # (ARGS are in lower case to distinguish them from ENV)
 # Check https://julialang.org/downloads/
-ARG julia_version="1.6.0"
+ARG julia_version="1.6.1"
 # SHA256 checksum
-ARG julia_checksum="463b71dc70ca7094c0e0fd6d55d130051a7901e8dec5eb44d6002c57d1bd8585"
+ARG julia_checksum="7c888adec3ea42afbfed2ce756ce1164a570d50fa7506c3f2e1e2cbc49d52506"
 
 # R pre-requisites
 RUN apt-get update --yes && \
diff --git a/minimal-notebook/Dockerfile b/minimal-notebook/Dockerfile
index eda2cb80..5f573bdc 100644
--- a/minimal-notebook/Dockerfile
+++ b/minimal-notebook/Dockerfile
@@ -10,7 +10,6 @@ USER root
 # Install all OS dependencies for fully functional notebook server
 RUN apt-get update --yes && \
     apt-get install --yes --no-install-recommends \
-    build-essential \
     vim-tiny \
     git \
     inkscape \