diff --git a/.Gopkg.toml b/.Gopkg.toml
index 6baacca..af85908 100644
--- a/.Gopkg.toml
+++ b/.Gopkg.toml
@@ -42,17 +42,21 @@
   name = "golang.org/x/time"
 
 [[constraint]]
-  branch = "master"
+  branch = "release-1.12"
   name = "k8s.io/api"
 
 [[constraint]]
-  branch = "master"
+  branch = "release-1.12"
   name = "k8s.io/apimachinery"
 
 [[constraint]]
-  branch = "master"
+  branch = "release-9.0"
   name = "k8s.io/client-go"
 
+[[constraint]]
+  branch = "release-1.12"
+  name = "k8s.io/kubernetes"
+
 [prune]
   go-tests = true
   unused-packages = true
diff --git a/controller/controller.go b/controller/controller.go
index 0878c51..2aabc53 100644
--- a/controller/controller.go
+++ b/controller/controller.go
@@ -41,7 +41,6 @@ import (
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	utilruntime "k8s.io/apimachinery/pkg/util/runtime"
 	"k8s.io/apimachinery/pkg/util/uuid"
-	utilversion "k8s.io/apimachinery/pkg/util/version"
 	"k8s.io/apimachinery/pkg/util/wait"
 	"k8s.io/client-go/informers"
 	"k8s.io/client-go/kubernetes"
@@ -53,6 +52,7 @@ import (
 	"k8s.io/client-go/tools/record"
 	ref "k8s.io/client-go/tools/reference"
 	"k8s.io/client-go/util/workqueue"
+	utilversion "k8s.io/kubernetes/pkg/util/version"
 )
 
 // annClass annotation represents the storage class associated with a resource:
diff --git a/controller/controller_test.go b/controller/controller_test.go
index 42badd8..df1a311 100644
--- a/controller/controller_test.go
+++ b/controller/controller_test.go
@@ -31,7 +31,6 @@ import (
 	"k8s.io/apimachinery/pkg/runtime"
 	"k8s.io/apimachinery/pkg/types"
 	utilruntime "k8s.io/apimachinery/pkg/util/runtime"
-	utilversion "k8s.io/apimachinery/pkg/util/version"
 	"k8s.io/client-go/informers"
 	"k8s.io/client-go/kubernetes"
 	"k8s.io/client-go/kubernetes/fake"
@@ -39,6 +38,7 @@ import (
 	testclient "k8s.io/client-go/testing"
 	"k8s.io/client-go/tools/cache"
 	ref "k8s.io/client-go/tools/reference"
+	utilversion "k8s.io/kubernetes/pkg/util/version"
 )
 
 const (
diff --git a/examples/hostpath-provisioner/Gopkg.toml b/examples/hostpath-provisioner/Gopkg.toml
index afbe1e7..f492648 100644
--- a/examples/hostpath-provisioner/Gopkg.toml
+++ b/examples/hostpath-provisioner/Gopkg.toml
@@ -30,19 +30,19 @@
   name = "github.com/golang/glog"
 
 [[constraint]]
-  branch = "master"
+  branch = "release-1.12"
   name = "github.com/kubernetes-sigs/sig-storage-lib-external-provisioner"
 
 [[constraint]]
-  branch = "master"
+  branch = "release-1.12"
   name = "k8s.io/api"
 
 [[constraint]]
-  branch = "master"
+  branch = "release-1.12"
   name = "k8s.io/apimachinery"
 
 [[constraint]]
-  branch = "master"
+  branch = "release-9.0"
   name = "k8s.io/client-go"
 
 [prune]
diff --git a/test/e2e/test.sh b/test/e2e/test.sh
index bf4efae..5803107 100755
--- a/test/e2e/test.sh
+++ b/test/e2e/test.sh
@@ -17,7 +17,7 @@
 set -x
 PS4='+\t '
 
-curl -L https://dl.k8s.io/v1.13.0-alpha.1/kubernetes-server-linux-amd64.tar.gz | tar xz
+curl -L https://dl.k8s.io/v1.12.0/kubernetes-server-linux-amd64.tar.gz | tar xz
 tar xz -f kubernetes/kubernetes-src.tar.gz -C kubernetes
 
 kubernetes/hack/install-etcd.sh