diff --git a/.travis.yml b/.travis.yml
index 35b608fbb..cbcd13aec 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,6 +2,8 @@ language: bash
 services: docker
 
 env:
+  - VERSION=2.3 VARIANT=
+  - VERSION=2.3 VARIANT=slim
   - VERSION=2.2 VARIANT=
   - VERSION=2.2 VARIANT=slim
   - VERSION=2.1 VARIANT=
diff --git a/2.3/Dockerfile b/2.3/Dockerfile
new file mode 100644
index 000000000..4d848354e
--- /dev/null
+++ b/2.3/Dockerfile
@@ -0,0 +1,43 @@
+FROM buildpack-deps:jessie
+
+ENV RUBY_MAJOR 2.3
+ENV RUBY_VERSION 2.3.0
+ENV RUBY_DOWNLOAD_SHA256 ba5ba60e5f1aa21b4ef8e9bf35b9ddb57286cb546aac4b5a28c71f459467e507
+ENV RUBYGEMS_VERSION 2.5.1
+
+# skip installing gem documentation
+RUN echo 'install: --no-document\nupdate: --no-document' >> "$HOME/.gemrc"
+
+# some of ruby's build scripts are written in ruby
+# we purge this later to make sure our final image uses what we just built
+RUN apt-get update \
+	&& apt-get install -y bison libgdbm-dev ruby \
+	&& rm -rf /var/lib/apt/lists/* \
+	&& mkdir -p /usr/src/ruby \
+	&& curl -fSL -o ruby.tar.gz "http://cache.ruby-lang.org/pub/ruby/$RUBY_MAJOR/ruby-$RUBY_VERSION.tar.gz" \
+	&& echo "$RUBY_DOWNLOAD_SHA256 *ruby.tar.gz" | sha256sum -c - \
+	&& tar -xzf ruby.tar.gz -C /usr/src/ruby --strip-components=1 \
+	&& rm ruby.tar.gz \
+	&& cd /usr/src/ruby \
+	&& autoconf \
+	&& ./configure --disable-install-doc \
+	&& make -j"$(nproc)" \
+	&& make install \
+	&& apt-get purge -y --auto-remove bison libgdbm-dev ruby \
+	&& gem update --system $RUBYGEMS_VERSION \
+	&& rm -r /usr/src/ruby
+
+# install things globally, for great justice
+ENV GEM_HOME /usr/local/bundle
+ENV PATH $GEM_HOME/bin:$PATH
+
+ENV BUNDLER_VERSION 1.11.2
+
+RUN gem install bundler --version "$BUNDLER_VERSION" \
+	&& bundle config --global path "$GEM_HOME" \
+	&& bundle config --global bin "$GEM_HOME/bin"
+
+# don't create ".bundle" in all our apps
+ENV BUNDLE_APP_CONFIG $GEM_HOME
+
+CMD [ "irb" ]
diff --git a/2.3/onbuild/Dockerfile b/2.3/onbuild/Dockerfile
new file mode 100644
index 000000000..7accb9c59
--- /dev/null
+++ b/2.3/onbuild/Dockerfile
@@ -0,0 +1,13 @@
+FROM ruby:2.3
+
+# throw errors if Gemfile has been modified since Gemfile.lock
+RUN bundle config --global frozen 1
+
+RUN mkdir -p /usr/src/app
+WORKDIR /usr/src/app
+
+ONBUILD COPY Gemfile /usr/src/app/
+ONBUILD COPY Gemfile.lock /usr/src/app/
+ONBUILD RUN bundle install
+
+ONBUILD COPY . /usr/src/app
diff --git a/2.3/slim/Dockerfile b/2.3/slim/Dockerfile
new file mode 100644
index 000000000..4abb8ced3
--- /dev/null
+++ b/2.3/slim/Dockerfile
@@ -0,0 +1,71 @@
+FROM debian:jessie
+
+RUN apt-get update \
+	&& apt-get install -y --no-install-recommends \
+		bzip2 \
+		ca-certificates \
+		curl \
+		libffi-dev \
+		libgdbm3 \
+		libssl-dev \
+		libyaml-dev \
+		procps \
+		zlib1g-dev \
+	&& rm -rf /var/lib/apt/lists/*
+
+ENV RUBY_MAJOR 2.3
+ENV RUBY_VERSION 2.3.0
+ENV RUBY_DOWNLOAD_SHA256 ba5ba60e5f1aa21b4ef8e9bf35b9ddb57286cb546aac4b5a28c71f459467e507
+ENV RUBYGEMS_VERSION 2.5.1
+
+# skip installing gem documentation
+RUN echo 'install: --no-document\nupdate: --no-document' >> "$HOME/.gemrc"
+
+# some of ruby's build scripts are written in ruby
+# we purge this later to make sure our final image uses what we just built
+RUN buildDeps=' \
+		autoconf \
+		bison \
+		gcc \
+		libbz2-dev \
+		libgdbm-dev \
+		libglib2.0-dev \
+		libncurses-dev \
+		libreadline-dev \
+		libxml2-dev \
+		libxslt-dev \
+		make \
+		ruby \
+	' \
+	&& set -x \
+	&& apt-get update \
+	&& apt-get install -y --no-install-recommends $buildDeps \
+	&& rm -rf /var/lib/apt/lists/* \
+	&& mkdir -p /usr/src/ruby \
+	&& curl -fSL -o ruby.tar.gz "http://cache.ruby-lang.org/pub/ruby/$RUBY_MAJOR/ruby-$RUBY_VERSION.tar.gz" \
+	&& echo "$RUBY_DOWNLOAD_SHA256 *ruby.tar.gz" | sha256sum -c - \
+	&& tar -xzf ruby.tar.gz -C /usr/src/ruby --strip-components=1 \
+	&& rm ruby.tar.gz \
+	&& cd /usr/src/ruby \
+	&& autoconf \
+	&& ./configure --disable-install-doc \
+	&& make -j"$(nproc)" \
+	&& make install \
+	&& gem update --system $RUBYGEMS_VERSION \
+	&& rm -r /usr/src/ruby \
+	&& apt-get purge -y --auto-remove $buildDeps
+
+# install things globally, for great justice
+ENV GEM_HOME /usr/local/bundle
+ENV PATH $GEM_HOME/bin:$PATH
+
+ENV BUNDLER_VERSION 1.11.2
+
+RUN gem install bundler --version "$BUNDLER_VERSION" \
+	&& bundle config --global path "$GEM_HOME" \
+	&& bundle config --global bin "$GEM_HOME/bin"
+
+# don't create ".bundle" in all our apps
+ENV BUNDLE_APP_CONFIG $GEM_HOME
+
+CMD [ "irb" ]