diff --git a/slavepython/32bit/Dockerfile b/slavepython/32bit/Dockerfile
index 8396113..ff328d9 100644
--- a/slavepython/32bit/Dockerfile
+++ b/slavepython/32bit/Dockerfile
@@ -1,13 +1,13 @@
-# Do not edit this file manually, it was generated on 2015-11-07 at 20:42 from slavepython/Dockerfile.in
+# Do not edit this file manually, it was generated on 2016-03-31 at 11:08 from slavepython/Dockerfile.in
  # Define an image for CoolProp Python buildslaves
-FROM coolprop/slavebase32:latest
+FROM coolprop/slavebase32:v1.3
  # File Author / Maintainer
 MAINTAINER Jorrit Wronski <jowr@ipu.dk>
  # Make sure the follwoing commands are run as root user
 USER root
 WORKDIR /root
  # Install system tools for compilation of Python extensions numpy-scipy-pandas
-RUN apt-get update -qq && DEBIAN_FRONTEND="noninteractive" apt-get install -y \
+RUN apt-key update -qq && apt-get update -qq && DEBIAN_FRONTEND="noninteractive" apt-get install -y \
 build-essential gcc python-dev libhdf5-serial-dev libnetcdf-dev liblapack-dev libatlas-dev libblas-dev && \
 DEBIAN_FRONTEND="noninteractive" apt-get autoclean && DEBIAN_FRONTEND="noninteractive" apt-get clean && DEBIAN_FRONTEND="noninteractive" apt-get autoremove
  # Make sure the following commands are run as the buildbot user
@@ -17,4 +17,4 @@ WORKDIR /home/buildbot
 RUN curl -o miniconda.sh "http://repo.continuum.io/miniconda/Miniconda-latest-Linux-x86.sh" && chmod +x miniconda.sh && linux32 ./miniconda.sh -b && rm miniconda.sh && echo "export PATH=/home/buildbot/miniconda3/bin:/home/buildbot/miniconda2/bin:$PATH" >> /home/buildbot/.bash_profile
 ENV PATH /home/buildbot/miniconda3/bin:/home/buildbot/miniconda2/bin:$PATH
  # Add the miniconda environments for the Python builds
-RUN linux32 conda install conda-build && linux32 conda create -n CoolProp27 python=2.7 cython pip requests jinja2 pyyaml pycrypto numpy scipy matplotlib pandas wheel && linux32 conda create -n CoolProp33 python=3.3 cython pip requests jinja2 pyyaml pycrypto numpy scipy matplotlib pandas wheel && linux32 conda create -n CoolProp34 python=3.4 cython pip requests jinja2 pyyaml pycrypto numpy scipy matplotlib pandas wheel && linux32 conda clean -yilts
+RUN linux32 conda install conda-build && linux32 conda create -n CoolProp27 python=2.7 cython pip requests jinja2 pyyaml pycrypto numpy scipy matplotlib pandas wheel && linux32 conda create -n CoolProp33 python=3.3 cython pip requests jinja2 pyyaml pycrypto numpy scipy matplotlib pandas wheel && linux32 conda create -n CoolProp34 python=3.4 cython pip requests jinja2 pyyaml pycrypto numpy scipy matplotlib pandas wheel && linux32 conda create -n CoolProp35 python=3.5 cython pip requests jinja2 pyyaml pycrypto numpy scipy matplotlib pandas wheel && linux32 conda clean -yilts
diff --git a/slavepython/64bit/Dockerfile b/slavepython/64bit/Dockerfile
index b5af1e1..a15c180 100644
--- a/slavepython/64bit/Dockerfile
+++ b/slavepython/64bit/Dockerfile
@@ -1,13 +1,13 @@
-# Do not edit this file manually, it was generated on 2015-11-07 at 20:42 from slavepython/Dockerfile.in
+# Do not edit this file manually, it was generated on 2016-03-31 at 11:08 from slavepython/Dockerfile.in
  # Define an image for CoolProp Python buildslaves
-FROM coolprop/slavebase:latest
+FROM coolprop/slavebase:v1.3
  # File Author / Maintainer
 MAINTAINER Jorrit Wronski <jowr@ipu.dk>
  # Make sure the follwoing commands are run as root user
 USER root
 WORKDIR /root
  # Install system tools for compilation of Python extensions numpy-scipy-pandas
-RUN apt-get update -qq && DEBIAN_FRONTEND="noninteractive" apt-get install -y \
+RUN apt-key update -qq && apt-get update -qq && DEBIAN_FRONTEND="noninteractive" apt-get install -y \
 build-essential gcc python-dev libhdf5-serial-dev libnetcdf-dev liblapack-dev libatlas-dev libblas-dev && \
 DEBIAN_FRONTEND="noninteractive" apt-get autoclean && DEBIAN_FRONTEND="noninteractive" apt-get clean && DEBIAN_FRONTEND="noninteractive" apt-get autoremove
  # Make sure the following commands are run as the buildbot user
@@ -17,4 +17,4 @@ WORKDIR /home/buildbot
 RUN curl -o miniconda.sh "http://repo.continuum.io/miniconda/Miniconda-latest-Linux-x86_64.sh" && chmod +x miniconda.sh && ./miniconda.sh -b && rm miniconda.sh && echo "export PATH=/home/buildbot/miniconda3/bin:/home/buildbot/miniconda2/bin:$PATH" >> /home/buildbot/.bash_profile
 ENV PATH /home/buildbot/miniconda3/bin:/home/buildbot/miniconda2/bin:$PATH
  # Add the miniconda environments for the Python builds
-RUN conda install conda-build && conda create -n CoolProp27 python=2.7 cython pip requests jinja2 pyyaml pycrypto numpy scipy matplotlib pandas wheel && conda create -n CoolProp33 python=3.3 cython pip requests jinja2 pyyaml pycrypto numpy scipy matplotlib pandas wheel && conda create -n CoolProp34 python=3.4 cython pip requests jinja2 pyyaml pycrypto numpy scipy matplotlib pandas wheel && conda clean -yilts
+RUN conda install conda-build && conda create -n CoolProp27 python=2.7 cython pip requests jinja2 pyyaml pycrypto numpy scipy matplotlib pandas wheel && conda create -n CoolProp33 python=3.3 cython pip requests jinja2 pyyaml pycrypto numpy scipy matplotlib pandas wheel && conda create -n CoolProp34 python=3.4 cython pip requests jinja2 pyyaml pycrypto numpy scipy matplotlib pandas wheel && conda create -n CoolProp35 python=3.5 cython pip requests jinja2 pyyaml pycrypto numpy scipy matplotlib pandas wheel && conda clean -yilts