diff --git a/cluster/mesos/docker/keygen/Dockerfile b/cluster/mesos/docker/keygen/Dockerfile
index 59d92371d7a..2b332935878 100644
--- a/cluster/mesos/docker/keygen/Dockerfile
+++ b/cluster/mesos/docker/keygen/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:14.04.2
+FROM ubuntu:14.04.3
 MAINTAINER Mesosphere <support@mesosphere.io>
 
 RUN locale-gen en_US.UTF-8
diff --git a/cluster/mesos/docker/km/Dockerfile b/cluster/mesos/docker/km/Dockerfile
index 6f170c0a66e..2bbb7c338a3 100644
--- a/cluster/mesos/docker/km/Dockerfile
+++ b/cluster/mesos/docker/km/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:14.04.2
+FROM ubuntu:14.04.3
 MAINTAINER Mesosphere <support@mesosphere.io>
 
 RUN locale-gen en_US.UTF-8
diff --git a/cluster/mesos/docker/test/Dockerfile b/cluster/mesos/docker/test/Dockerfile
index 93f5ced8a5d..43d41d98042 100644
--- a/cluster/mesos/docker/test/Dockerfile
+++ b/cluster/mesos/docker/test/Dockerfile
@@ -1,4 +1,4 @@
-FROM golang:1.4.2
+FROM golang:1.4.3
 MAINTAINER Mesosphere <support@mesosphere.io>
 
 # docker.io is suppossed to be in backports, but it's not there yet.