diff --git a/vendor/github.com/cncd/pipeline/pipeline/multipart/reader.go b/vendor/github.com/cncd/pipeline/pipeline/multipart/reader.go
index 7ae67868..3ff9e3c9 100644
--- a/vendor/github.com/cncd/pipeline/pipeline/multipart/reader.go
+++ b/vendor/github.com/cncd/pipeline/pipeline/multipart/reader.go
@@ -38,9 +38,9 @@ type (
 // New returns a new multipart Reader.
 func New(r io.Reader) Reader {
 	buf := bufio.NewReader(r)
-	out, _ := buf.Peek(4)
+	out, _ := buf.Peek(8)
 
-	if bytes.Equal(out, []byte("MIME")) {
+	if bytes.Equal(out, []byte("PIPELINE")) {
 		return &multipartReader{
 			reader: multipart.NewReader(buf, "boundary"),
 		}
diff --git a/vendor/vendor.json b/vendor/vendor.json
index 542512b6..3120db35 100644
--- a/vendor/vendor.json
+++ b/vendor/vendor.json
@@ -33,68 +33,68 @@
 		{
 			"checksumSHA1": "W3AuK8ocqHwlUajGmQLFvnRhTZE=",
 			"path": "github.com/cncd/pipeline/pipeline",
-			"revision": "e07174ea942444803e706f11b902b6c06b7c9074",
-			"revisionTime": "2017-03-12T08:59:32Z"
+			"revision": "a4badab355e3c2ecc03f2048b0b97f0180df12b2",
+			"revisionTime": "2017-03-13T03:05:09Z"
 		},
 		{
 			"checksumSHA1": "Qu2FreqaMr8Yx2bW9O0cxAGgjr0=",
 			"path": "github.com/cncd/pipeline/pipeline/backend",
-			"revision": "e07174ea942444803e706f11b902b6c06b7c9074",
-			"revisionTime": "2017-03-12T08:59:32Z"
+			"revision": "a4badab355e3c2ecc03f2048b0b97f0180df12b2",
+			"revisionTime": "2017-03-13T03:05:09Z"
 		},
 		{
 			"checksumSHA1": "0CGXRaYwZhJxGIrGhn8WGpkFqPo=",
 			"path": "github.com/cncd/pipeline/pipeline/backend/docker",
-			"revision": "e07174ea942444803e706f11b902b6c06b7c9074",
-			"revisionTime": "2017-03-12T08:59:32Z"
+			"revision": "a4badab355e3c2ecc03f2048b0b97f0180df12b2",
+			"revisionTime": "2017-03-13T03:05:09Z"
 		},
 		{
 			"checksumSHA1": "/8wE+cVb7T4PQZgpLNu0DHzKGuE=",
 			"path": "github.com/cncd/pipeline/pipeline/frontend",
-			"revision": "e07174ea942444803e706f11b902b6c06b7c9074",
-			"revisionTime": "2017-03-12T08:59:32Z"
+			"revision": "a4badab355e3c2ecc03f2048b0b97f0180df12b2",
+			"revisionTime": "2017-03-13T03:05:09Z"
 		},
 		{
 			"checksumSHA1": "O0sulBQAHJeNLg3lO38Cq5uf/eg=",
 			"path": "github.com/cncd/pipeline/pipeline/frontend/yaml",
-			"revision": "e07174ea942444803e706f11b902b6c06b7c9074",
-			"revisionTime": "2017-03-12T08:59:32Z"
+			"revision": "a4badab355e3c2ecc03f2048b0b97f0180df12b2",
+			"revisionTime": "2017-03-13T03:05:09Z"
 		},
 		{
 			"checksumSHA1": "Iu+QmUqkN9ZsBdmVlCclVKthJbM=",
 			"path": "github.com/cncd/pipeline/pipeline/frontend/yaml/compiler",
-			"revision": "e07174ea942444803e706f11b902b6c06b7c9074",
-			"revisionTime": "2017-03-12T08:59:32Z"
+			"revision": "a4badab355e3c2ecc03f2048b0b97f0180df12b2",
+			"revisionTime": "2017-03-13T03:05:09Z"
 		},
 		{
 			"checksumSHA1": "Q0GkNUFamVYIA1Fd8r0A5M6Gx54=",
 			"path": "github.com/cncd/pipeline/pipeline/frontend/yaml/linter",
-			"revision": "e07174ea942444803e706f11b902b6c06b7c9074",
-			"revisionTime": "2017-03-12T08:59:32Z"
+			"revision": "a4badab355e3c2ecc03f2048b0b97f0180df12b2",
+			"revisionTime": "2017-03-13T03:05:09Z"
 		},
 		{
 			"checksumSHA1": "kx2sPUIMozPC/g6E4w48h3FfH3k=",
 			"path": "github.com/cncd/pipeline/pipeline/frontend/yaml/matrix",
-			"revision": "e07174ea942444803e706f11b902b6c06b7c9074",
-			"revisionTime": "2017-03-12T08:59:32Z"
+			"revision": "a4badab355e3c2ecc03f2048b0b97f0180df12b2",
+			"revisionTime": "2017-03-13T03:05:09Z"
 		},
 		{
 			"checksumSHA1": "2/3f3oNmxXy5kcrRLCFa24Oc9O4=",
 			"path": "github.com/cncd/pipeline/pipeline/interrupt",
-			"revision": "e07174ea942444803e706f11b902b6c06b7c9074",
-			"revisionTime": "2017-03-12T08:59:32Z"
+			"revision": "a4badab355e3c2ecc03f2048b0b97f0180df12b2",
+			"revisionTime": "2017-03-13T03:05:09Z"
 		},
 		{
-			"checksumSHA1": "dM6mk8qbEM90u4/o3OKUlDGXyYA=",
+			"checksumSHA1": "uOjTfke7Qxosrivgz/nVTHeIP5g=",
 			"path": "github.com/cncd/pipeline/pipeline/multipart",
-			"revision": "e07174ea942444803e706f11b902b6c06b7c9074",
-			"revisionTime": "2017-03-12T08:59:32Z"
+			"revision": "a4badab355e3c2ecc03f2048b0b97f0180df12b2",
+			"revisionTime": "2017-03-13T03:05:09Z"
 		},
 		{
 			"checksumSHA1": "MratmNKJ78/IhWvDsZphN01CtmE=",
 			"path": "github.com/cncd/pipeline/pipeline/rpc",
-			"revision": "e07174ea942444803e706f11b902b6c06b7c9074",
-			"revisionTime": "2017-03-12T08:59:32Z"
+			"revision": "a4badab355e3c2ecc03f2048b0b97f0180df12b2",
+			"revisionTime": "2017-03-13T03:05:09Z"
 		},
 		{
 			"checksumSHA1": "7Qj1DK0ceAXkYztW0l3+L6sn+V8=",