diff --git a/cmd/kubeadm/app/constants/constants.go b/cmd/kubeadm/app/constants/constants.go
index 8cd287f31e3..3228dce9952 100644
--- a/cmd/kubeadm/app/constants/constants.go
+++ b/cmd/kubeadm/app/constants/constants.go
@@ -420,12 +420,12 @@ var (
 
 	// SupportedEtcdVersion lists officially supported etcd versions with corresponding Kubernetes releases
 	SupportedEtcdVersion = map[uint8]string{
-		12: "3.2.24",
 		13: "3.2.24",
 		14: "3.3.10",
 		15: "3.3.10",
 		16: "3.3.15-0",
 		17: "3.3.15-0",
+		18: "3.3.15-0",
 	}
 
 	// KubeadmCertsClusterRoleName sets the name for the ClusterRole that allows