diff --git a/Dockerfile.omnibus-gitlab-centos6 b/Dockerfile.omnibus-gitlab-centos6
index e5a039c..ae4bdcd 100644
--- a/Dockerfile.omnibus-gitlab-centos6
+++ b/Dockerfile.omnibus-gitlab-centos6
@@ -3,7 +3,7 @@ FROM centos:centos6
 RUN yum update -y -q \
   && yum groupinstall -y Development Tools \
   && yum install -y \
-        gcc gcc-c++ git make curl zlib-devel openssl-devel \
+        devtoolset-6-gcc devtoolset-6-gcc-c++ git make curl zlib-devel openssl-devel \
   && yum clean all
 
 ENV LANG en_US.UTF-8
@@ -20,3 +20,11 @@ RUN curl -fsSL "https://cache.ruby-lang.org/pub/ruby/2.4/ruby-${RUBY_VERSION}.ta
   && cd / \
   && rm -rf "/tmp/ruby-${RUBY_VERSION}" \
   && gem install bundler --no-document
+
+# Make new GCC available inside the container by default
+RUN echo $'\
+export CC=/opt/rh/devtoolset-6/root/usr/bin/gcc \n\
+export CPP=/opt/rh/devtoolset-6/root/usr/bin/cpp \n\
+export CXX=/opt/rh/devtoolset-6/root/usr/bin/c++ \n\
+' > /etc/profile.d/devtools.sh
+