diff --git a/vendor/github.com/hashicorp/go-plugin/client.go b/vendor/github.com/hashicorp/go-plugin/client.go
index e192be515d22..b912826b200c 100644
--- a/vendor/github.com/hashicorp/go-plugin/client.go
+++ b/vendor/github.com/hashicorp/go-plugin/client.go
@@ -21,8 +21,6 @@ import (
 	"time"
 	"unicode"
 
-	"encoding/json"
-
 	hclog "github.com/hashicorp/go-hclog"
 )
 
@@ -271,8 +269,11 @@ func NewClient(config *ClientConfig) (c *Client) {
 	}
 
 	if config.Logger == nil {
-		config.Logger = hclog.Default()
-		config.Logger = config.Logger.ResetNamed("plugin")
+		config.Logger = hclog.New(&hclog.LoggerOptions{
+			Output: hclog.DefaultOutput,
+			Level:  hclog.Trace,
+			Name:   "plugin",
+		})
 	}
 
 	c = &Client{
@@ -737,16 +738,12 @@ func (c *Client) logStderr(r io.Reader) {
 			line = strings.TrimRightFunc(line, unicode.IsSpace)
 
 			l := c.logger.Named(filepath.Base(c.config.Cmd.Path))
-			// If output is not JSON format, print directly as error
-			if !isJSON(line) {
-				l.Debug("log from plugin", "entry", line)
+
+			entry, err := parseJSON(line)
+			// If output is not JSON format, print directly to Debug
+			if err != nil {
+				l.Debug(line)
 			} else {
-				// Parse JSON line received from the plugin into logEntry, and print via
-				// the client's logger
-				entry, err := parseJSON(line)
-				if err != nil {
-					l.Error("error parsing json from plugin", "error", err)
-				}
 				out := flattenKVPairs(entry.KVPairs)
 
 				l = l.With("timestamp", entry.Timestamp.Format(hclog.TimeFormat))
@@ -773,8 +770,3 @@ func (c *Client) logStderr(r io.Reader) {
 	// Flag that we've completed logging for others
 	close(c.doneLogging)
 }
-
-func isJSON(str string) bool {
-	var js json.RawMessage
-	return json.Unmarshal([]byte(str), &js) == nil
-}
diff --git a/vendor/vendor.json b/vendor/vendor.json
index bf6d011f4035..4c8d9125c20c 100644
--- a/vendor/vendor.json
+++ b/vendor/vendor.json
@@ -1259,10 +1259,10 @@
 			"revision": "d30f09973e19c1dfcd120b2d9c4f168e68d6b5d5"
 		},
 		{
-			"checksumSHA1": "PjvQA7yNIn9/8ns0i6Sd8TvTwhY=",
+			"checksumSHA1": "R6me0jVmcT/OPo80Fe0qo5fRwHc=",
 			"path": "github.com/hashicorp/go-plugin",
-			"revision": "871e7582ebde6a93f3e03d8c6fa0d2eb2eb98d02",
-			"revisionTime": "2017-08-07T16:10:15Z"
+			"revision": "a5174f84d7f8ff00fb07ab4ef1f380d32eee0e63",
+			"revisionTime": "2017-08-16T15:18:19Z"
 		},
 		{
 			"checksumSHA1": "ErJHGU6AVPZM9yoY/xV11TwSjQs=",