diff --git a/go.mod b/go.mod
index b2f3b7b..ee859f2 100644
--- a/go.mod
+++ b/go.mod
@@ -2,4 +2,4 @@ module github.com/solarhell/wechat-open-platform
 
 go 1.12
 
-require github.com/imroc/req v0.3.0
+require github.com/imroc/req v0.3.2
diff --git a/go.sum b/go.sum
index 0f3680c..2c66909 100644
--- a/go.sum
+++ b/go.sum
@@ -1,4 +1,2 @@
-github.com/imroc/req v0.2.4 h1:8XbvaQpERLAJV6as/cB186DtH5f0m5zAOtHEaTQ4ac0=
-github.com/imroc/req v0.2.4/go.mod h1:J9FsaNHDTIVyW/b5r6/Df5qKEEEq2WzZKIgKSajd1AE=
-github.com/imroc/req v0.3.0 h1:3EioagmlSG+z+KySToa+Ylo3pTFZs+jh3Brl7ngU12U=
-github.com/imroc/req v0.3.0/go.mod h1:F+NZ+2EFSo6EFXdeIbpfE9hcC233id70kf0byW97Caw=
+github.com/imroc/req v0.3.2 h1:M/JkeU6RPmX+WYvT2vaaOL0K+q8ufL5LxwvJc4xeB4o=
+github.com/imroc/req v0.3.2/go.mod h1:F+NZ+2EFSo6EFXdeIbpfE9hcC233id70kf0byW97Caw=
diff --git a/vendor/github.com/imroc/req/README.md b/vendor/github.com/imroc/req/README.md
index 7d54deb..8319dab 100644
--- a/vendor/github.com/imroc/req/README.md
+++ b/vendor/github.com/imroc/req/README.md
@@ -81,7 +81,7 @@ param := req.Param{
 	"cmd":  "add",
 }
 // only url is required, others are optional.
-r, err = req.Post("http://foo.bar/api", header, param)
+r, err := req.Post("http://foo.bar/api", header, param)
 if err != nil {
 	log.Fatal(err)
 }
@@ -161,7 +161,7 @@ req.Post(url, req.BodyXML(&bar))
 ```
 
 ## <a name="Debug">Debug</a>
-Set global variable `req.Debug` to true, it will print detail infomation for every request.
+Set global variable `req.Debug` to true, it will print detail information for every request.
 ``` go
 req.Debug = true
 req.Post("http://localhost/test" "hi")
@@ -169,7 +169,7 @@ req.Post("http://localhost/test" "hi")
 ![post](doc/post.png)
 
 ## <a name="Format">Output Format</a>
-You can use different kind of output format to log the request and response infomation in your log file in defferent scenarios. For example, use `%+v` output format in the development phase, it allows you to observe the details. Use `%v` or `%-v` output format in production phase, just log the information necessarily.  
+You can use different kind of output format to log the request and response information in your log file in defferent scenarios. For example, use `%+v` output format in the development phase, it allows you to observe the details. Use `%v` or `%-v` output format in production phase, just log the information necessarily.  
 
 ### `%+v` or `%+s`
 Output in detail
diff --git a/vendor/github.com/imroc/req/dump.go b/vendor/github.com/imroc/req/dump.go
index ce6d3a5..52e527e 100644
--- a/vendor/github.com/imroc/req/dump.go
+++ b/vendor/github.com/imroc/req/dump.go
@@ -207,10 +207,11 @@ func (r *Resp) Dump() string {
 	l := dump.Len()
 	if l > 0 {
 		dump.WriteString("=================================")
-		l = dump.Len()
 	}
 
-	r.dumpResponse(dump)
+	if r.resp != nil {
+		r.dumpResponse(dump)
+	}
 
 	return dump.String()
 }
diff --git a/vendor/github.com/imroc/req/header.go b/vendor/github.com/imroc/req/header.go
index ac1be32..dbc5992 100644
--- a/vendor/github.com/imroc/req/header.go
+++ b/vendor/github.com/imroc/req/header.go
@@ -39,3 +39,4 @@ func HeaderFromStruct(v interface{}) Header {
 	return header
 }
 
+type ReservedHeader map[string]string
diff --git a/vendor/github.com/imroc/req/req.go b/vendor/github.com/imroc/req/req.go
index 01937f0..99c04b3 100644
--- a/vendor/github.com/imroc/req/req.go
+++ b/vendor/github.com/imroc/req/req.go
@@ -171,6 +171,13 @@ func (r *Req) Do(method, rawurl string, vs ...interface{}) (resp *Resp, err erro
 	}
 	resp = &Resp{req: req, r: r}
 
+	// output detail if Debug is enabled
+	if Debug {
+		defer func(resp *Resp) {
+			fmt.Println(resp.Dump())
+		}(resp)
+	}
+
 	var queryParam param
 	var formParam param
 	var uploads []FileUpload
@@ -191,6 +198,10 @@ func (r *Req) Do(method, rawurl string, vs ...interface{}) (resp *Resp, err erro
 					req.Header.Add(key, value)
 				}
 			}
+		case ReservedHeader:
+			for key, value := range vv {
+				req.Header[key] = []string{value}
+			}
 		case *bodyJson:
 			fn, err := setBodyJson(req, resp, r.jsonEncOpts, vv.v)
 			if err != nil {
@@ -340,10 +351,6 @@ func (r *Req) Do(method, rawurl string, vs ...interface{}) (resp *Resp, err erro
 		response.Body = body
 	}
 
-	// output detail if Debug is enabled
-	if Debug {
-		fmt.Println(resp.Dump())
-	}
 	return
 }
 
diff --git a/vendor/github.com/imroc/req/resp.go b/vendor/github.com/imroc/req/resp.go
index b464c2b..e5c36fc 100644
--- a/vendor/github.com/imroc/req/resp.go
+++ b/vendor/github.com/imroc/req/resp.go
@@ -43,7 +43,7 @@ func (r *Resp) Bytes() []byte {
 }
 
 // ToBytes returns response body as []byte,
-// return error if error happend when reading
+// return error if error happened when reading
 // the response body
 func (r *Resp) ToBytes() ([]byte, error) {
 	if r.err != nil {
@@ -69,7 +69,7 @@ func (r *Resp) String() string {
 }
 
 // ToString returns response body as string,
-// return error if error happend when reading
+// return error if error happened when reading
 // the response body
 func (r *Resp) ToString() (string, error) {
 	data, err := r.ToBytes()
diff --git a/vendor/modules.txt b/vendor/modules.txt
index 7379466..ac7b47b 100644
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -1,2 +1,2 @@
-# github.com/imroc/req v0.3.0
+# github.com/imroc/req v0.3.2
 github.com/imroc/req