diff --git a/cmd/metrics-server/app/options/kubelet_client.go b/cmd/metrics-server/app/options/kubelet_client.go
index 7ffd7baa1..752938426 100644
--- a/cmd/metrics-server/app/options/kubelet_client.go
+++ b/cmd/metrics-server/app/options/kubelet_client.go
@@ -115,6 +115,7 @@ func (o KubeletClientOptions) Config(restConfig *rest.Config) *client.KubeletCli
 		config.Client.TLSClientConfig.Insecure = true
 		config.Client.TLSClientConfig.CAData = nil
 		config.Client.TLSClientConfig.CAFile = ""
+		config.Client.TLSClientConfig.NextProtos = []string{"http/1.1", "h2"}
 	}
 	if len(o.KubeletCAFile) > 0 {
 		config.Client.TLSClientConfig.CAFile = o.KubeletCAFile
diff --git a/cmd/metrics-server/app/options/kubelet_client_test.go b/cmd/metrics-server/app/options/kubelet_client_test.go
index 63c0b6a95..fe257b2e8 100644
--- a/cmd/metrics-server/app/options/kubelet_client_test.go
+++ b/cmd/metrics-server/app/options/kubelet_client_test.go
@@ -40,7 +40,7 @@ func TestConfig(t *testing.T) {
 			CAFile:   "CAFile",
 			CertData: []byte("CertData"),
 			KeyData:  []byte("KeyData"),
-			CAData:   []byte("CAData"),
+			CAData:   []uint8("CAData"),
 		},
 		UserAgent: "UserAgent",
 	}
@@ -75,8 +75,13 @@ func TestConfig(t *testing.T) {
 			expectFunc: func() client.KubeletClientConfig {
 				e := expected
 				e.Client.Insecure = true
+				e.Client.KeyFile = "KeyFile"
+				e.Client.KeyData = []byte("KeyData")
 				e.Client.CAFile = ""
 				e.Client.CAData = nil
+				e.Client.CertFile = "CertFile"
+				e.Client.CertData = []byte("CertData")
+				e.Client.NextProtos = []string{"http/1.1", "h2"}
 				return e
 			},
 		},