diff --git a/docker/kolab/Dockerfile b/docker/kolab/Dockerfile
index b709a2ce..1af9ab16 100644
--- a/docker/kolab/Dockerfile
+++ b/docker/kolab/Dockerfile
@@ -1,26 +1,22 @@
 FROM kolab/centos7:latest
 
-RUN rpm --import https://ssl.kolabsys.com/maipo.asc && \
-    yum -y install https://ssl.kolabsys.com/kolab-16-for-el7.rpm && \
-    sed -i -r -e '/^ssl/d' /etc/yum.repos.d/*.repo && \
-    yum -y install --setopt 'tsflags=' kolab rsyslog && \
-    yum -y update cyrus-imapd && \
+RUN yum -y install rsyslog && \
     yum clean all
 
 RUN systemctl disable \
         avahi-daemon.service \
         avahi-daemon.socket \
         sshd.service && \
     systemctl enable rsyslog
 
 RUN sed -i -r -e 's/^SELINUX=.*$/SELINUX=permissive/g' /etc/selinux/config
 
 COPY kolab-init.service /etc/systemd/system/kolab-init.service
 RUN systemctl enable kolab-init.service
 
 COPY kolab-init.sh /usr/local/sbin/
 RUN chmod 750 /usr/local/sbin/kolab-init.sh
 
 CMD ["/lib/systemd/systemd"]
 
 EXPOSE 21/tcp 22/tcp 25/tcp 53/tcp 53/udp 80/tcp 110/tcp 143/tcp 389/tcp 443/tcp 465/tcp 587/tcp 993/tcp 995/tcp 5353/udp 8880/tcp 8443/tcp 8447/tcp