diff --git a/base-notebook/Dockerfile b/base-notebook/Dockerfile
index b9602400..45132ed3 100644
--- a/base-notebook/Dockerfile
+++ b/base-notebook/Dockerfile
@@ -1,9 +1,9 @@
 # Copyright (c) Jupyter Development Team.
 # Distributed under the terms of the Modified BSD License.
 
-# Ubuntu 18.04 (bionic) from 2018-04-26
+# Ubuntu 18.04 (bionic) from 2018-05-26
 # https://github.com/docker-library/official-images/commit/aac6a45b9eb2bffb8102353c350d341a410fb169
-FROM ubuntu:bionic-20180426@sha256:c8c275751219dadad8fa56b3ac41ca6cb22219ff117ca98fe82b42f24e1ba64e
+FROM ubuntu:bionic-20180526@sha256:c8c275751219dadad8fa56b3ac41ca6cb22219ff117ca98fe82b42f24e1ba64e
 
 LABEL maintainer="Jupyter Project <jupyter@googlegroups.com>"
 
@@ -63,16 +63,16 @@ RUN mkdir /home/$NB_USER/work && \
     fix-permissions /home/$NB_USER
 
 # Install conda as jovyan and check the md5 sum provided on the download site
-ENV MINICONDA_VERSION 4.5.1
+ENV MINICONDA_VERSION 4.5.4
 RUN cd /tmp && \
     wget --quiet https://repo.continuum.io/miniconda/Miniconda3-${MINICONDA_VERSION}-Linux-x86_64.sh && \
-    echo "0c28787e3126238df24c5d4858bd0744 *Miniconda3-${MINICONDA_VERSION}-Linux-x86_64.sh" | md5sum -c - && \
+    echo "a946ea1d0c4a642ddf0c3a26a18bb16d *Miniconda3-${MINICONDA_VERSION}-Linux-x86_64.sh" | md5sum -c - && \
     /bin/bash Miniconda3-${MINICONDA_VERSION}-Linux-x86_64.sh -f -b -p $CONDA_DIR && \
     rm Miniconda3-${MINICONDA_VERSION}-Linux-x86_64.sh && \
     $CONDA_DIR/bin/conda config --system --prepend channels conda-forge && \
     $CONDA_DIR/bin/conda config --system --set auto_update_conda false && \
     $CONDA_DIR/bin/conda config --system --set show_channel_urls true && \
-    $CONDA_DIR/bin/conda install --quiet --yes conda=4.5.4 && \
+    $CONDA_DIR/bin/conda install --quiet --yes conda=${MINICONDA_VERSION} && \
     $CONDA_DIR/bin/conda update --all --quiet --yes && \
     conda clean -tipsy && \
     rm -rf /home/$NB_USER/.cache/yarn && \