diff --git a/Dockerfile b/Dockerfile
index a357bce..0a8e539 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -32,7 +32,7 @@ RUN set -ex \
   done
 
 ENV NPM_CONFIG_LOGLEVEL info
-ENV NODE_VERSION 8.8.1
+ENV NODE_VERSION 8.9.3
 
 RUN curl -SLO "https://nodejs.org/dist/v$NODE_VERSION/node-v$NODE_VERSION-linux-x64.tar.xz" \
   && curl -SLO "https://nodejs.org/dist/v$NODE_VERSION/SHASUMS256.txt.asc" \
@@ -42,18 +42,18 @@ RUN curl -SLO "https://nodejs.org/dist/v$NODE_VERSION/node-v$NODE_VERSION-linux-
   && rm "node-v$NODE_VERSION-linux-x64.tar.xz" SHASUMS256.txt.asc SHASUMS256.txt
 
 # download and install Erlang package
-RUN wget http://packages.erlang-solutions.com/erlang-solutions_1.0_all.deb \
+RUN wget https://packages.erlang-solutions.com/erlang-solutions_1.0_all.deb \
  && dpkg -i erlang-solutions_1.0_all.deb \
  && apt-get update
 
-ENV ERLANG_VERSION 1:20.1
+ENV ERLANG_VERSION 1:20.2.2
 
 # install Erlang
 RUN apt-get install -y esl-erlang=$ERLANG_VERSION && rm erlang-solutions_1.0_all.deb
 
 RUN apt-mark hold esl-erlang
 
-ENV ELIXIR_VERSION 1.5.1
+ENV ELIXIR_VERSION 1.6.0
 
 # install Elixir
 RUN mkdir /opt/elixir \
@@ -72,8 +72,8 @@ ENV PHOENIX_VERSION 1.3.0
 RUN mix archive.install --force https://github.com/phoenixframework/archives/raw/master/phx_new-$PHOENIX_VERSION.ez
 
 # include Dockerize to help launching containers
-RUN wget https://github.com/jwilder/dockerize/releases/download/v0.5.0/dockerize-linux-amd64-v0.5.0.tar.gz
-RUN tar -C /usr/local/bin -xzvf dockerize-linux-amd64-v0.5.0.tar.gz && rm dockerize-linux-amd64-v0.5.0.tar.gz
+RUN wget https://github.com/jwilder/dockerize/releases/download/v0.6.0/dockerize-linux-amd64-v0.6.0.tar.gz
+RUN tar -C /usr/local/bin -xzvf dockerize-linux-amd64-v0.6.0.tar.gz && rm dockerize-linux-amd64-v0.6.0.tar.gz
 
 # include wait-for-it.sh
 RUN curl -o /bin/wait-for-it.sh https://raw.githubusercontent.com/vishnubob/wait-for-it/master/wait-for-it.sh