diff --git a/Godeps/Godeps.json b/Godeps/Godeps.json
index f324cbfe..ea7a5dd1 100644
--- a/Godeps/Godeps.json
+++ b/Godeps/Godeps.json
@@ -352,7 +352,7 @@
 		},
 		{
 			"ImportPath": "k8s.io/apimachinery",
-			"Rev": "670e6d490571"
+			"Rev": "2c7f8d2b0fd8"
 		},
 		{
 			"ImportPath": "k8s.io/gengo",
diff --git a/go.mod b/go.mod
index 99e9ce1c..11cc5132 100644
--- a/go.mod
+++ b/go.mod
@@ -29,7 +29,7 @@ require (
 	golang.org/x/time v0.0.0-20190308202827-9d24e82272b4
 	google.golang.org/appengine v1.5.0 // indirect
 	k8s.io/api v0.0.0-20191107030003-665c8a257c1a
-	k8s.io/apimachinery v0.0.0-20191107025710-670e6d490571
+	k8s.io/apimachinery v0.0.0-20191107105744-2c7f8d2b0fd8
 	k8s.io/klog v1.0.0
 	k8s.io/utils v0.0.0-20191030222137-2b95a09bc58d
 	sigs.k8s.io/yaml v1.1.0
@@ -39,5 +39,5 @@ replace (
 	golang.org/x/sys => golang.org/x/sys v0.0.0-20190813064441-fde4db37ae7a
 	golang.org/x/tools => golang.org/x/tools v0.0.0-20190821162956-65e3620a7ae7
 	k8s.io/api => k8s.io/api v0.0.0-20191107030003-665c8a257c1a
-	k8s.io/apimachinery => k8s.io/apimachinery v0.0.0-20191107025710-670e6d490571
+	k8s.io/apimachinery => k8s.io/apimachinery v0.0.0-20191107105744-2c7f8d2b0fd8
 )
diff --git a/go.sum b/go.sum
index c19b6893..76e96853 100644
--- a/go.sum
+++ b/go.sum
@@ -192,7 +192,7 @@ gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 honnef.co/go/tools v0.0.0-20190106161140-3f1c8253044a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 k8s.io/api v0.0.0-20191107030003-665c8a257c1a/go.mod h1:gBpbNJH4JlHuCXtSTkFwvuGtM+dvyfLKuFOTt1WtKAM=
-k8s.io/apimachinery v0.0.0-20191107025710-670e6d490571/go.mod h1:DJOb3m0kw91A0YaUsaoYChi4d7xVF84HLiuRCxGsV04=
+k8s.io/apimachinery v0.0.0-20191107105744-2c7f8d2b0fd8/go.mod h1:DJOb3m0kw91A0YaUsaoYChi4d7xVF84HLiuRCxGsV04=
 k8s.io/gengo v0.0.0-20190128074634-0689ccc1d7d6/go.mod h1:ezvh/TsK7cY6rbqRK0oQQ8IAqLxYwwyPxAX1Pzy0ii0=
 k8s.io/klog v0.0.0-20181102134211-b9b56d5dfc92/go.mod h1:Gq+BEi5rUBO/HRz0bTSXDUcqjScdoY3a9IHpCEIOOfk=
 k8s.io/klog v0.3.0/go.mod h1:Gq+BEi5rUBO/HRz0bTSXDUcqjScdoY3a9IHpCEIOOfk=
diff --git a/util/cert/pem.go b/util/cert/pem.go
index 9185e2e2..c7751231 100644
--- a/util/cert/pem.go
+++ b/util/cert/pem.go
@@ -17,6 +17,7 @@ limitations under the License.
 package cert
 
 import (
+	"bytes"
 	"crypto/x509"
 	"encoding/pem"
 	"errors"
@@ -59,3 +60,14 @@ func ParseCertsPEM(pemCerts []byte) ([]*x509.Certificate, error) {
 	}
 	return certs, nil
 }
+
+// EncodeCertificates returns the PEM-encoded byte array that represents by the specified certs.
+func EncodeCertificates(certs ...*x509.Certificate) ([]byte, error) {
+	b := bytes.Buffer{}
+	for _, cert := range certs {
+		if err := pem.Encode(&b, &pem.Block{Type: CertificateBlockType, Bytes: cert.Raw}); err != nil {
+			return []byte{}, err
+		}
+	}
+	return b.Bytes(), nil
+}