diff --git a/datacenter/install/linux.md b/datacenter/install/linux.md
index 7d3cc9e23a..87b39df922 100644
--- a/datacenter/install/linux.md
+++ b/datacenter/install/linux.md
@@ -20,7 +20,7 @@ EE have a minimum of:
 
 Also, make sure the hosts are running one of these operating systems:
 
-* CentOS 7.4
+* A maintained version of CentOS 7. Archived versions aren't supported or tested.
 * Red Hat Enterprise Linux 7.0, 7.1, 7.2, or 7.3
 * Ubuntu 14.04 LTS or 16.04 LTS
 * SUSE Linux Enterprise 12
diff --git a/datacenter/ucp/2.2/guides/admin/install/system-requirements.md b/datacenter/ucp/2.2/guides/admin/install/system-requirements.md
index a5598e3ead..6020e5b999 100644
--- a/datacenter/ucp/2.2/guides/admin/install/system-requirements.md
+++ b/datacenter/ucp/2.2/guides/admin/install/system-requirements.md
@@ -20,7 +20,7 @@ all nodes must have:
 
 Also, make sure the nodes are running one of these operating systems:
 
-* CentOS 7.4
+* A maintained version of CentOS 7. Archived versions aren't supported or tested.
 * Red Hat Enterprise Linux 7.0, 7.1, 7.2, 7.3, or 7.4
 * Ubuntu 14.04 LTS or 16.04 LTS
 * SUSE Linux Enterprise 12
diff --git a/engine/installation/linux/docker-ce/centos.md b/engine/installation/linux/docker-ce/centos.md
index ee7a7515dd..ce572b492e 100644
--- a/engine/installation/linux/docker-ce/centos.md
+++ b/engine/installation/linux/docker-ce/centos.md
@@ -25,7 +25,8 @@ To learn more about Docker EE, see
 
 ### OS requirements
 
-To install Docker CE, you need the 64-bit version of CentOS 7.
+To install Docker CE, you need a maintained version of CentOS 7. Archived
+versions aren't supported or tested.
 
 The `centos-extras` repository must be enabled. This repository is enabled by
 default, but if you have disabled it, you need to
diff --git a/engine/installation/linux/docker-ee/centos.md b/engine/installation/linux/docker-ee/centos.md
index d7846c0b09..1dd7a97bb7 100644
--- a/engine/installation/linux/docker-ee/centos.md
+++ b/engine/installation/linux/docker-ee/centos.md
@@ -27,7 +27,8 @@ Docker CE users should go to
 
 ### OS requirements
 
-To install Docker EE, you need the 64-bit version of {{ linux-dist-long}} 7.
+To install Docker EE, you need a maintained version of CentOS 7. Archived
+versions aren't supported or tested.
 
 The `centos-extras` repository must be enabled. This repository is enabled by
 default, but if you have disabled it, you need to