diff --git a/cmd/kube-apiserver/app/aggregator.go b/cmd/kube-apiserver/app/aggregator.go
index 38fe52aaac2..e3f413b1c9a 100644
--- a/cmd/kube-apiserver/app/aggregator.go
+++ b/cmd/kube-apiserver/app/aggregator.go
@@ -179,24 +179,25 @@ var apiVersionPriorities = map[schema.GroupVersion]priority{
 	// can reasonably expect seems questionable.
 	{Group: "extensions", Version: "v1beta1"}: {group: 17900, version: 1},
 	// to my knowledge, nothing below here collides
-	{Group: "apps", Version: "v1beta1"}:                       {group: 17800, version: 1},
-	{Group: "authentication.k8s.io", Version: "v1"}:           {group: 17700, version: 15},
-	{Group: "authentication.k8s.io", Version: "v1beta1"}:      {group: 17700, version: 9},
-	{Group: "authorization.k8s.io", Version: "v1"}:            {group: 17600, version: 15},
-	{Group: "authorization.k8s.io", Version: "v1beta1"}:       {group: 17600, version: 9},
-	{Group: "autoscaling", Version: "v1"}:                     {group: 17500, version: 15},
-	{Group: "autoscaling", Version: "v2alpha1"}:               {group: 17500, version: 9},
-	{Group: "batch", Version: "v1"}:                           {group: 17400, version: 15},
-	{Group: "batch", Version: "v2alpha1"}:                     {group: 17400, version: 9},
-	{Group: "certificates.k8s.io", Version: "v1beta1"}:        {group: 17300, version: 9},
-	{Group: "networking.k8s.io", Version: "v1"}:               {group: 17200, version: 15},
-	{Group: "policy", Version: "v1beta1"}:                     {group: 17100, version: 9},
-	{Group: "rbac.authorization.k8s.io", Version: "v1beta1"}:  {group: 17000, version: 12},
-	{Group: "rbac.authorization.k8s.io", Version: "v1alpha1"}: {group: 17000, version: 9},
-	{Group: "settings.k8s.io", Version: "v1alpha1"}:           {group: 16900, version: 9},
-	{Group: "storage.k8s.io", Version: "v1"}:                  {group: 16800, version: 15},
-	{Group: "storage.k8s.io", Version: "v1beta1"}:             {group: 16800, version: 9},
-	{Group: "apiextensions.k8s.io", Version: "v1beta1"}:       {group: 16700, version: 9},
+	{Group: "apps", Version: "v1beta1"}:                          {group: 17800, version: 1},
+	{Group: "authentication.k8s.io", Version: "v1"}:              {group: 17700, version: 15},
+	{Group: "authentication.k8s.io", Version: "v1beta1"}:         {group: 17700, version: 9},
+	{Group: "authorization.k8s.io", Version: "v1"}:               {group: 17600, version: 15},
+	{Group: "authorization.k8s.io", Version: "v1beta1"}:          {group: 17600, version: 9},
+	{Group: "autoscaling", Version: "v1"}:                        {group: 17500, version: 15},
+	{Group: "autoscaling", Version: "v2alpha1"}:                  {group: 17500, version: 9},
+	{Group: "batch", Version: "v1"}:                              {group: 17400, version: 15},
+	{Group: "batch", Version: "v2alpha1"}:                        {group: 17400, version: 9},
+	{Group: "certificates.k8s.io", Version: "v1beta1"}:           {group: 17300, version: 9},
+	{Group: "networking.k8s.io", Version: "v1"}:                  {group: 17200, version: 15},
+	{Group: "policy", Version: "v1beta1"}:                        {group: 17100, version: 9},
+	{Group: "rbac.authorization.k8s.io", Version: "v1beta1"}:     {group: 17000, version: 12},
+	{Group: "rbac.authorization.k8s.io", Version: "v1alpha1"}:    {group: 17000, version: 9},
+	{Group: "settings.k8s.io", Version: "v1alpha1"}:              {group: 16900, version: 9},
+	{Group: "storage.k8s.io", Version: "v1"}:                     {group: 16800, version: 15},
+	{Group: "storage.k8s.io", Version: "v1beta1"}:                {group: 16800, version: 9},
+	{Group: "apiextensions.k8s.io", Version: "v1beta1"}:          {group: 16700, version: 9},
+	{Group: "admissionregistration.k8s.io", Version: "v1alpha1"}: {group: 16700, version: 9},
 }
 
 func apiServicesToRegister(delegateAPIServer genericapiserver.DelegationTarget, registration autoregister.AutoAPIServiceRegistration) []*apiregistration.APIService {