diff --git a/roles/ipabackup/README.md b/roles/ipabackup/README.md
index 435c292d..b87ec394 100644
--- a/roles/ipabackup/README.md
+++ b/roles/ipabackup/README.md
@@ -34,7 +34,7 @@ Supported Distributions
 
 * RHEL/CentOS 7.6+
 * Fedora 26+
-* Ubuntu
+* Ubuntu 16.04 and 18.04
 
 
 Requirements
diff --git a/roles/ipareplica/README.md b/roles/ipareplica/README.md
index fd7388a5..b227223f 100644
--- a/roles/ipareplica/README.md
+++ b/roles/ipareplica/README.md
@@ -28,7 +28,7 @@ Supported Distributions
 
 * RHEL/CentOS 7.6+
 * Fedora 26+
-* Ubuntu
+* Ubuntu 16.04 and 18.04
 
 
 Requirements
diff --git a/roles/ipaserver/README.md b/roles/ipaserver/README.md
index 40ea6ad0..54fdc8b7 100644
--- a/roles/ipaserver/README.md
+++ b/roles/ipaserver/README.md
@@ -25,7 +25,7 @@ Supported Distributions
 
 * RHEL/CentOS 7.6+
 * Fedora 26+
-* Ubuntu
+* Ubuntu 16.04 and 18.04
 
 
 Requirements