diff --git a/vendor/github.com/json-iterator/go/README.md b/vendor/github.com/json-iterator/go/README.md
index 54d5afe..50d56ff 100644
--- a/vendor/github.com/json-iterator/go/README.md
+++ b/vendor/github.com/json-iterator/go/README.md
@@ -10,10 +10,6 @@
 
 You can also use thrift like JSON using [thrift-iterator](https://github.com/thrift-iterator/go)
 
-```
-Go开发者们请加入我们，滴滴出行平台技术部 taowen@didichuxing.com
-```
-
 # Benchmark
 
 ![benchmark](http://jsoniter.com/benchmarks/go-benchmark.png)
diff --git a/vendor/github.com/json-iterator/go/any.go b/vendor/github.com/json-iterator/go/any.go
index daecfed..f6b8aea 100644
--- a/vendor/github.com/json-iterator/go/any.go
+++ b/vendor/github.com/json-iterator/go/any.go
@@ -312,6 +312,10 @@
 
 func (codec *directAnyCodec) Encode(ptr unsafe.Pointer, stream *Stream) {
 	any := *(*Any)(ptr)
+	if any == nil {
+		stream.WriteNil()
+		return
+	}
 	any.WriteTo(stream)
 }
 
diff --git a/vendor/github.com/json-iterator/go/iter_float.go b/vendor/github.com/json-iterator/go/iter_float.go
index 4f883c0..b975463 100644
--- a/vendor/github.com/json-iterator/go/iter_float.go
+++ b/vendor/github.com/json-iterator/go/iter_float.go
@@ -77,14 +77,12 @@
 }
 
 func (iter *Iterator) readPositiveFloat32() (ret float32) {
-	value := uint64(0)
-	c := byte(' ')
 	i := iter.head
 	// first char
 	if i == iter.tail {
 		return iter.readFloat32SlowPath()
 	}
-	c = iter.buf[i]
+	c := iter.buf[i]
 	i++
 	ind := floatDigits[c]
 	switch ind {
@@ -107,7 +105,7 @@
 			return
 		}
 	}
-	value = uint64(ind)
+	value := uint64(ind)
 	// chars before dot
 non_decimal_loop:
 	for ; i < iter.tail; i++ {
@@ -145,9 +143,7 @@
 				}
 				// too many decimal places
 				return iter.readFloat32SlowPath()
-			case invalidCharForNumber:
-				fallthrough
-			case dotInNumber:
+			case invalidCharForNumber, dotInNumber:
 				return iter.readFloat32SlowPath()
 			}
 			decimalPlaces++
@@ -218,14 +214,12 @@
 }
 
 func (iter *Iterator) readPositiveFloat64() (ret float64) {
-	value := uint64(0)
-	c := byte(' ')
 	i := iter.head
 	// first char
 	if i == iter.tail {
 		return iter.readFloat64SlowPath()
 	}
-	c = iter.buf[i]
+	c := iter.buf[i]
 	i++
 	ind := floatDigits[c]
 	switch ind {
@@ -248,7 +242,7 @@
 			return
 		}
 	}
-	value = uint64(ind)
+	value := uint64(ind)
 	// chars before dot
 non_decimal_loop:
 	for ; i < iter.tail; i++ {
@@ -286,9 +280,7 @@
 				}
 				// too many decimal places
 				return iter.readFloat64SlowPath()
-			case invalidCharForNumber:
-				fallthrough
-			case dotInNumber:
+			case invalidCharForNumber, dotInNumber:
 				return iter.readFloat64SlowPath()
 			}
 			decimalPlaces++
diff --git a/vendor/github.com/json-iterator/go/iter_skip_strict.go b/vendor/github.com/json-iterator/go/iter_skip_strict.go
index f67bc2e..6cf66d0 100644
--- a/vendor/github.com/json-iterator/go/iter_skip_strict.go
+++ b/vendor/github.com/json-iterator/go/iter_skip_strict.go
@@ -2,12 +2,22 @@
 
 package jsoniter
 
-import "fmt"
+import (
+	"fmt"
+	"io"
+)
 
 func (iter *Iterator) skipNumber() {
 	if !iter.trySkipNumber() {
 		iter.unreadByte()
-		iter.ReadFloat32()
+		if iter.Error != nil && iter.Error != io.EOF {
+			return
+		}
+		iter.ReadFloat64()
+		if iter.Error != nil && iter.Error != io.EOF {
+			iter.Error = nil
+			iter.ReadBigFloat()
+		}
 	}
 }
 
diff --git a/vendor/github.com/json-iterator/go/reflect_extension.go b/vendor/github.com/json-iterator/go/reflect_extension.go
index 04f6875..05e8fbf 100644
--- a/vendor/github.com/json-iterator/go/reflect_extension.go
+++ b/vendor/github.com/json-iterator/go/reflect_extension.go
@@ -338,7 +338,7 @@
 	for i := 0; i < structType.NumField(); i++ {
 		field := structType.Field(i)
 		tag, hastag := field.Tag().Lookup(ctx.getTagKey())
-		if ctx.onlyTaggedField && !hastag {
+		if ctx.onlyTaggedField && !hastag && !field.Anonymous() {
 			continue
 		}
 		tagParts := strings.Split(tag, ",")
diff --git a/vendor/github.com/json-iterator/go/reflect_map.go b/vendor/github.com/json-iterator/go/reflect_map.go
index 7f66a88..547b442 100644
--- a/vendor/github.com/json-iterator/go/reflect_map.go
+++ b/vendor/github.com/json-iterator/go/reflect_map.go
@@ -64,14 +64,26 @@
 		return &numericMapKeyDecoder{decoderOfType(ctx, typ)}
 	default:
 		ptrType := reflect2.PtrTo(typ)
-		if ptrType.Implements(textMarshalerType) {
+		if ptrType.Implements(unmarshalerType) {
+			return &referenceDecoder{
+				&unmarshalerDecoder{
+					valType: ptrType,
+				},
+			}
+		}
+		if typ.Implements(unmarshalerType) {
+			return &unmarshalerDecoder{
+				valType: typ,
+			}
+		}
+		if ptrType.Implements(textUnmarshalerType) {
 			return &referenceDecoder{
 				&textUnmarshalerDecoder{
 					valType: ptrType,
 				},
 			}
 		}
-		if typ.Implements(textMarshalerType) {
+		if typ.Implements(textUnmarshalerType) {
 			return &textUnmarshalerDecoder{
 				valType: typ,
 			}
diff --git a/vendor/github.com/json-iterator/go/reflect_marshaler.go b/vendor/github.com/json-iterator/go/reflect_marshaler.go
index 58ac959..fea5071 100644
--- a/vendor/github.com/json-iterator/go/reflect_marshaler.go
+++ b/vendor/github.com/json-iterator/go/reflect_marshaler.go
@@ -93,8 +93,7 @@
 		stream.WriteNil()
 		return
 	}
-	marshaler := obj.(json.Marshaler)
-	bytes, err := marshaler.MarshalJSON()
+	bytes, err := json.Marshal(obj)
 	if err != nil {
 		stream.Error = err
 	} else {