diff --git a/all-spark-notebook/Dockerfile b/all-spark-notebook/Dockerfile
index 73c88f5a..2bffec5f 100644
--- a/all-spark-notebook/Dockerfile
+++ b/all-spark-notebook/Dockerfile
@@ -20,11 +20,11 @@ RUN apt-get update && \
 USER $NB_USER
 
 # R packages
-RUN conda config --system --add channels r && \
-    conda install --quiet --yes \
+RUN conda install --quiet --yes \
     'r-base=3.3.2' \
     'r-irkernel=0.7*' \
     'r-ggplot2=2.2*' \
+    'r-sparklyr=0.5*' \
     'r-rcurl=1.95*' && conda clean -tipsy
 
 # Apache Toree kernel
@@ -32,6 +32,6 @@ RUN pip --no-cache-dir install https://dist.apache.org/repos/dist/dev/incubator/
 RUN jupyter toree install --sys-prefix
 
 # Spylon-kernel
-RUN conda install --quiet --yes 'spylon-kernel=0.2*' && \
+RUN conda install --quiet --yes 'spylon-kernel=0.4*' && \
     conda clean -tipsy
 RUN python -m spylon_kernel install --sys-prefix
diff --git a/base-notebook/Dockerfile b/base-notebook/Dockerfile
index 82790d12..3fcf752c 100644
--- a/base-notebook/Dockerfile
+++ b/base-notebook/Dockerfile
@@ -55,22 +55,25 @@ USER $NB_USER
 # Setup work directory for backward-compatibility
 RUN mkdir /home/$NB_USER/work
 
-# Install conda as jovyan
+# Install conda as jovyan and check the md5 sum provided on the download site
+ENV MINICONDA_VERSION 4.3.21
 RUN cd /tmp && \
     mkdir -p $CONDA_DIR && \
-    wget --quiet https://repo.continuum.io/miniconda/Miniconda3-4.2.12-Linux-x86_64.sh && \
-    echo "c59b3dd3cad550ac7596e0d599b91e75d88826db132e4146030ef471bb434e9a *Miniconda3-4.2.12-Linux-x86_64.sh" | sha256sum -c - && \
-    /bin/bash Miniconda3-4.2.12-Linux-x86_64.sh -f -b -p $CONDA_DIR && \
-    rm Miniconda3-4.2.12-Linux-x86_64.sh && \
-    $CONDA_DIR/bin/conda config --system --add channels conda-forge && \
+    wget --quiet https://repo.continuum.io/miniconda/Miniconda3-${MINICONDA_VERSION}-Linux-x86_64.sh && \
+    echo "c1c15d3baba15bf50293ae963abef853 *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 update --all && \
     conda clean -tipsy
 
 # Install Jupyter Notebook and Hub
 RUN conda install --quiet --yes \
     'notebook=5.0.*' \
     'jupyterhub=0.7.*' \
-    'jupyterlab=0.18.*' \
+    'jupyterlab=0.24.*' \
     && conda clean -tipsy
 
 USER root
diff --git a/minimal-notebook/Dockerfile b/minimal-notebook/Dockerfile
index 3b56ed16..be058cd3 100644
--- a/minimal-notebook/Dockerfile
+++ b/minimal-notebook/Dockerfile
@@ -9,24 +9,25 @@ USER root
 
 # Install all OS dependencies for fully functional notebook server
 RUN apt-get update && apt-get install -yq --no-install-recommends \
-    git \
-    vim \
-    jed \
-    emacs \
     build-essential \
-    python-dev \
-    unzip \
+    emacs \
+    git \
+    inkscape \
+    jed \
     libsm6 \
+    libxext-dev \
+    libxrender1 \
+    lmodern \
     pandoc \
-    texlive-latex-base \
-    texlive-latex-extra \
+    python-dev \
     texlive-fonts-extra \
     texlive-fonts-recommended \
     texlive-generic-recommended \
+    texlive-latex-base \
+    texlive-latex-extra \
     texlive-xetex \
-    lmodern \
-    libxrender1 \
-    inkscape \
+    vim \
+    unzip \
     && apt-get clean && \
     rm -rf /var/lib/apt/lists/*
 
diff --git a/r-notebook/Dockerfile b/r-notebook/Dockerfile
index 15747d3d..c9559d54 100644
--- a/r-notebook/Dockerfile
+++ b/r-notebook/Dockerfile
@@ -17,8 +17,7 @@ RUN apt-get update && \
 USER $NB_USER
 
 # R packages
-RUN conda config --system --add channels r && \
-    conda install --quiet --yes \
+RUN conda install --quiet --yes \
     'r-base=3.3.2' \
     'r-irkernel=0.7*' \
     'r-plyr=1.8*' \