diff --git a/roles/ipabackup/README.md b/roles/ipabackup/README.md
index 435c292dc93dc138af66a56e94c5c80de47f61f6..b87ec394076d9e08a75f29f71b09acdf5e7bbf84 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 fd7388a52a555488b43710d9d7adeae0a43b9b26..b227223f7cc6619bbb04b2c120b616db55c18fbc 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 40ea6ad08781f492e4d9489ffc6176367f5e4de1..54fdc8b74b380c759f041cada012fa3808d2abfb 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