diff --git a/Dockerfile b/Dockerfile
index 97cf52e502e44afc76bf3f4de782a053f58ed0b3..f4cd59164e8d7cbc6e68260f81bfe27f4a041393 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,23 +1,12 @@
-FROM debian:jessie
+FROM usgs/hazdev-base-images:latest-centos AS pycurl-build
 
-MAINTAINER Jeremy Fee <jmfee@usgs.gov>
-LABEL usgs.geomag-algorithms.version=0.2.0
-
-# update os
-RUN apt-get update --fix-missing && \
-    apt-get install -y --no-install-recommends \
+# install conda dependencies
+RUN yum install -y \
         bzip2 \
-        ca-certificates \
-        curl \
         gcc \
-        libcurl4-gnutls-dev \
-        libglib2.0-0 \
-        libgnutls28-dev \
-        libsm6 \
-        libxext6 \
-        libxrender1 && \
-    apt-get clean
-
+        libcurl-devel \
+        && \
+    yum clean all
 
 # install conda
 ENV PATH /conda/bin:$PATH
@@ -27,25 +16,30 @@ RUN echo 'export PATH=/conda/bin:$PATH' > /etc/profile.d/conda.sh && \
     /bin/bash ~/miniconda.sh -b -p /conda && \
     rm ~/miniconda.sh
 
+# install algorithms and dependencies via conda
+RUN conda config --set ssl_verify $SSL_CERT_FILE && \
+    conda config --add channels obspy && \
+    conda install --yes jupyter obspy && \
+    conda clean -i -l -t -y && \
+    # build pycurl with SFTP support
+        export PIP_CERT=$SSL_CERT_FILE && \
+        export PYCURL_SSL_LIBRARY=nss && \
+        pip install pycurl
 
-# copy library (ignores set in .dockerignore)
-COPY . /geomag-algorithms
 
+FROM usgs/hazdev-base-images:latest-centos
+MAINTAINER Jeremy Fee <jmfee@usgs.gov>
+LABEL usgs.geomag-algorithms.version=0.4.0
 
-# configure DOI SSL intercept certificate
-# (required when building image from within DOI network)
-RUN mkdir -p /usr/local/share/ca-certificates && \
-    cp /geomag-algorithms/etc/DOIRootCA2.crt /usr/local/share/ca-certificates/. && \
-    update-ca-certificates && \
-    conda config --set ssl_verify /etc/ssl/certs/ca-certificates.crt
+# use conda install from build container
+ENV PATH /conda/bin:$PATH
+COPY --from=pycurl-build /conda /conda
+COPY --from=pycurl-build /etc/profile.d/conda.sh /etc/profile.d/conda.sh
 
+# copy library (ignores set in .dockerignore)
+COPY . /geomag-algorithms
 
-# install algorithms and dependencies via conda
-RUN conda config --add channels obspy && \
-    conda install --yes jupyter obspy && \
-    conda clean -i -l -t -y && \
-    pip install pycurl && \
-    pip install /geomag-algorithms && \
+RUN pip install /geomag-algorithms && \
     useradd \
         -c 'Docker image user' \
         -m \
@@ -55,7 +49,6 @@ RUN conda config --add channels obspy && \
     mkdir -p /home/geomag_user/notebooks && \
     chown -R geomag_user:geomag_user /home/geomag_user
 
-
 USER geomag_user
 
 WORKDIR /home/geomag_user
diff --git a/README.md b/README.md
index 94c07e4f0976751c8d422697e314bfacc325728a..98cbeae3e6487787e90d4351cc316bac49bfbaad 100644
--- a/README.md
+++ b/README.md
@@ -88,10 +88,24 @@ Docker is the simplest install option.
     from the image `usgs/geomag-algorithms` on docker hub
 
     ```
-    docker run -d --name geomagio -p 8000:80 usgs/geomag-algorithms
+    docker run -d --name geomagio -p 8000:8000 usgs/geomag-algorithms
     ```
 
-2. Use the running container
+2. Find the token, (the token improves security)
+
+    ```
+    docker logs geomagio
+    ```
+
+    This outputs a URL to copy/paste into your browser address bar:
+    ```
+    Copy/paste this URL into your browser when you connect for the first time,
+    to login with a token:
+        http://localhost:8000/?token=TOKEN
+    ```
+
+
+3. Use the running container
 
   - Run the `geomag.py` command line interface:
 
@@ -99,10 +113,10 @@ Docker is the simplest install option.
     docker exec -it geomagio geomag.py
     ```
 
-  - Run python interactively in a web browser:
+  - Run python interactively in a web browser (using the token found in step 2):
 
     ```
-    open http://localhost:8000
+    http://localhost:8000/?token=TOKEN
     ```
 
     > In the top right corner, choose "New" then "Python 2"
diff --git a/setup.py b/setup.py
index d74bc0f5f276d4e3d0e4fc45049efde86ef8d630..a48b62df0bd1ce5de44e63e87e0215e517295414 100644
--- a/setup.py
+++ b/setup.py
@@ -2,7 +2,7 @@ from distutils.core import setup
 
 setup(
     name='geomag-algorithms',
-    version='0.3.1',
+    version='0.4.0',
     description='USGS Geomag IO Library',
     url='https://github.com/usgs/geomag-algorithms',
     packages=[