diff --git a/cmd/kubeadm/app/constants/constants.go b/cmd/kubeadm/app/constants/constants.go
index c93f553fd89..35dd4455426 100644
--- a/cmd/kubeadm/app/constants/constants.go
+++ b/cmd/kubeadm/app/constants/constants.go
@@ -317,7 +317,7 @@ const (
 	KubeletHealthzPort = 10248
 
 	// MinExternalEtcdVersion indicates minimum external etcd version which kubeadm supports
-	MinExternalEtcdVersion = "3.4.13-4"
+	MinExternalEtcdVersion = "3.5.11-0"
 
 	// DefaultEtcdVersion indicates the default etcd version that kubeadm uses
 	DefaultEtcdVersion = "3.5.13-0"
@@ -479,13 +479,6 @@ var (
 
 	// SupportedEtcdVersion lists officially supported etcd versions with corresponding Kubernetes releases
 	SupportedEtcdVersion = map[uint8]string{
-		22: "3.5.13-0",
-		23: "3.5.13-0",
-		24: "3.5.13-0",
-		25: "3.5.13-0",
-		26: "3.5.13-0",
-		27: "3.5.13-0",
-		28: "3.5.13-0",
 		29: "3.5.13-0",
 		30: "3.5.13-0",
 		31: "3.5.13-0",
diff --git a/cmd/kubeadm/app/constants/constants_test.go b/cmd/kubeadm/app/constants/constants_test.go
index bc33346a8d2..7ac9e271fba 100644
--- a/cmd/kubeadm/app/constants/constants_test.go
+++ b/cmd/kubeadm/app/constants/constants_test.go
@@ -124,11 +124,15 @@ func TestGetStaticPodFilepath(t *testing.T) {
 	}
 }
 
+func TestEtcdSupportedVersionLength(t *testing.T) {
+	const max = 3
+	if len(SupportedEtcdVersion) > max {
+		t.Fatalf("SupportedEtcdVersion must not include more than %d versions", max)
+	}
+}
+
 func TestEtcdSupportedVersion(t *testing.T) {
 	var supportedEtcdVersion = map[uint8]string{
-		13: "3.2.24",
-		14: "3.3.10",
-		15: "3.3.10",
 		16: "3.3.17-0",
 		17: "3.4.3-0",
 		18: "3.4.3-0",
@@ -147,7 +151,7 @@ func TestEtcdSupportedVersion(t *testing.T) {
 		},
 		{
 			kubernetesVersion: "1.10.1",
-			expectedVersion:   version.MustParseSemantic("3.2.24"),
+			expectedVersion:   version.MustParseSemantic("3.3.17-0"),
 			expectedWarning:   true,
 			expectedError:     false,
 		},