diff --git a/Dockerfile.omnibus-gitlab-bionic b/Dockerfile.omnibus-gitlab-bionic
index a111ebe..6180a54 100644
--- a/Dockerfile.omnibus-gitlab-bionic
+++ b/Dockerfile.omnibus-gitlab-bionic
@@ -12,8 +12,8 @@ ENV LANG en_US.UTF-8
 ENV LANGUAGE en_US:en
 ENV LC_ALL en_US.UTF-8
 
-ENV RUBY_VERSION 2.4.5
-RUN curl -fsSL "https://cache.ruby-lang.org/pub/ruby/2.4/ruby-${RUBY_VERSION}.tar.gz" \
+ENV RUBY_VERSION 2.6.3
+RUN curl -fsSL "https://cache.ruby-lang.org/pub/ruby/2.6/ruby-${RUBY_VERSION}.tar.gz" \
   | tar -xzC /tmp \
   && cd "/tmp/ruby-${RUBY_VERSION}" \
   && ./configure --disable-install-rdoc --disable-install-doc --disable-install-capi\
diff --git a/Dockerfile.omnibus-gitlab-centos6 b/Dockerfile.omnibus-gitlab-centos6
index e5a039c..5ed1961 100644
--- a/Dockerfile.omnibus-gitlab-centos6
+++ b/Dockerfile.omnibus-gitlab-centos6
@@ -10,8 +10,8 @@ ENV LANG en_US.UTF-8
 ENV LC_ALL en_US.UTF-8
 RUN localedef -c -f UTF-8 -i en_US en_US.UTF-8
 
-ENV RUBY_VERSION 2.4.5
-RUN curl -fsSL "https://cache.ruby-lang.org/pub/ruby/2.4/ruby-${RUBY_VERSION}.tar.gz" \
+ENV RUBY_VERSION 2.6.3
+RUN curl -fsSL "https://cache.ruby-lang.org/pub/ruby/2.6/ruby-${RUBY_VERSION}.tar.gz" \
   | tar -xzC /tmp \
   && cd "/tmp/ruby-${RUBY_VERSION}" \
   && ./configure --disable-install-rdoc --disable-install-doc --disable-install-capi\
diff --git a/Dockerfile.omnibus-gitlab-centos7 b/Dockerfile.omnibus-gitlab-centos7
index 116d176..e8386e3 100644
--- a/Dockerfile.omnibus-gitlab-centos7
+++ b/Dockerfile.omnibus-gitlab-centos7
@@ -10,8 +10,8 @@ ENV LANG en_US.UTF-8
 ENV LC_ALL en_US.UTF-8
 RUN localedef -c -f UTF-8 -i en_US en_US.UTF-8
 
-ENV RUBY_VERSION 2.4.5
-RUN curl -fsSL "https://cache.ruby-lang.org/pub/ruby/2.4/ruby-${RUBY_VERSION}.tar.gz" \
+ENV RUBY_VERSION 2.6.3
+RUN curl -fsSL "https://cache.ruby-lang.org/pub/ruby/2.6/ruby-${RUBY_VERSION}.tar.gz" \
   | tar -xzC /tmp \
   && cd "/tmp/ruby-${RUBY_VERSION}" \
   && ./configure --disable-install-rdoc --disable-install-doc --disable-install-capi\
diff --git a/Dockerfile.omnibus-gitlab-jessie b/Dockerfile.omnibus-gitlab-jessie
index 65d2cce..55d8920 100644
--- a/Dockerfile.omnibus-gitlab-jessie
+++ b/Dockerfile.omnibus-gitlab-jessie
@@ -12,8 +12,8 @@ ENV LANG en_US.UTF-8
 ENV LANGUAGE en_US:en
 ENV LC_ALL en_US.UTF-8
 
-ENV RUBY_VERSION 2.4.5
-RUN curl -fsSL "https://cache.ruby-lang.org/pub/ruby/2.4/ruby-${RUBY_VERSION}.tar.gz" \
+ENV RUBY_VERSION 2.6.3
+RUN curl -fsSL "https://cache.ruby-lang.org/pub/ruby/2.6/ruby-${RUBY_VERSION}.tar.gz" \
   | tar -xzC /tmp \
   && cd "/tmp/ruby-${RUBY_VERSION}" \
   && ./configure --disable-install-rdoc --disable-install-doc --disable-install-capi\
diff --git a/Dockerfile.omnibus-gitlab-opensuse42.3 b/Dockerfile.omnibus-gitlab-opensuse42.3
index 1c79e42..ec1bd72 100644
--- a/Dockerfile.omnibus-gitlab-opensuse42.3
+++ b/Dockerfile.omnibus-gitlab-opensuse42.3
@@ -11,8 +11,8 @@ ENV LC_ALL en_US.UTF-8
 ENV LANGUAGE en_US:en
 RUN localedef -i en_US -f UTF-8 en_US.UTF-8
 
-ENV RUBY_VERSION 2.4.5
-RUN curl -fsSL "https://cache.ruby-lang.org/pub/ruby/2.4/ruby-${RUBY_VERSION}.tar.gz" \
+ENV RUBY_VERSION 2.6.3
+RUN curl -fsSL "https://cache.ruby-lang.org/pub/ruby/2.6/ruby-${RUBY_VERSION}.tar.gz" \
   | tar -xzC /tmp \
   && cd "/tmp/ruby-${RUBY_VERSION}" \
   && ./configure --disable-install-rdoc --disable-install-doc --disable-install-capi\
diff --git a/Dockerfile.omnibus-gitlab-stretch b/Dockerfile.omnibus-gitlab-stretch
index 44cd329..373e447 100644
--- a/Dockerfile.omnibus-gitlab-stretch
+++ b/Dockerfile.omnibus-gitlab-stretch
@@ -13,8 +13,8 @@ ENV LANGUAGE en_US:en
 ENV LC_ALL en_US.UTF-8
 
 
-ENV RUBY_VERSION 2.4.5
-RUN curl -fsSL "https://cache.ruby-lang.org/pub/ruby/2.4/ruby-${RUBY_VERSION}.tar.gz" \
+ENV RUBY_VERSION 2.6.3
+RUN curl -fsSL "https://cache.ruby-lang.org/pub/ruby/2.6/ruby-${RUBY_VERSION}.tar.gz" \
   | tar -xzC /tmp \
   && cd "/tmp/ruby-${RUBY_VERSION}" \
   && ./configure --disable-install-rdoc --disable-install-doc --disable-install-capi\
diff --git a/Dockerfile.omnibus-gitlab-trusty b/Dockerfile.omnibus-gitlab-trusty
index 214543f..ee1cf51 100644
--- a/Dockerfile.omnibus-gitlab-trusty
+++ b/Dockerfile.omnibus-gitlab-trusty
@@ -6,8 +6,8 @@ RUN apt-get update -q \
         && apt-get clean -yqq \
         && rm -rf /var/lib/apt/lists/*
 
-ENV RUBY_VERSION 2.4.5
-RUN curl -fsSL "https://cache.ruby-lang.org/pub/ruby/2.4/ruby-${RUBY_VERSION}.tar.gz" \
+ENV RUBY_VERSION 2.6.3
+RUN curl -fsSL "https://cache.ruby-lang.org/pub/ruby/2.6/ruby-${RUBY_VERSION}.tar.gz" \
   | tar -xzC /tmp \
   && cd "/tmp/ruby-${RUBY_VERSION}" \
   && ./configure --disable-install-rdoc --disable-install-doc --disable-install-capi\
diff --git a/Dockerfile.omnibus-gitlab-wheezy b/Dockerfile.omnibus-gitlab-wheezy
index 6db7ccf..90b9d8c 100644
--- a/Dockerfile.omnibus-gitlab-wheezy
+++ b/Dockerfile.omnibus-gitlab-wheezy
@@ -12,8 +12,8 @@ ENV LANG en_US.UTF-8
 ENV LANGUAGE en_US:en
 ENV LC_ALL en_US.UTF-8
 
-ENV RUBY_VERSION 2.4.5
-RUN curl -fsSL "https://cache.ruby-lang.org/pub/ruby/2.4/ruby-${RUBY_VERSION}.tar.gz" \
+ENV RUBY_VERSION 2.6.3
+RUN curl -fsSL "https://cache.ruby-lang.org/pub/ruby/2.6/ruby-${RUBY_VERSION}.tar.gz" \
   | tar -xzC /tmp \
   && cd "/tmp/ruby-${RUBY_VERSION}" \
   && ./configure --disable-install-rdoc --disable-install-doc --disable-install-capi\
diff --git a/Dockerfile.omnibus-gitlab-xenial b/Dockerfile.omnibus-gitlab-xenial
index fb8a043..10261e1 100644
--- a/Dockerfile.omnibus-gitlab-xenial
+++ b/Dockerfile.omnibus-gitlab-xenial
@@ -12,8 +12,8 @@ ENV LANG en_US.UTF-8
 ENV LANGUAGE en_US:en
 ENV LC_ALL en_US.UTF-8
 
-ENV RUBY_VERSION 2.4.5
-RUN curl -fsSL "https://cache.ruby-lang.org/pub/ruby/2.4/ruby-${RUBY_VERSION}.tar.gz" \
+ENV RUBY_VERSION 2.6.3
+RUN curl -fsSL "https://cache.ruby-lang.org/pub/ruby/2.6/ruby-${RUBY_VERSION}.tar.gz" \
   | tar -xzC /tmp \
   && cd "/tmp/ruby-${RUBY_VERSION}" \
   && ./configure --disable-install-rdoc --disable-install-doc --disable-install-capi\