diff --git a/client.go b/client.go
index 36bb4f3..12e498b 100644
--- a/client.go
+++ b/client.go
@@ -66,7 +66,7 @@ func (c *Client) Request(method string, url string, args ...any) *Request {
 		headers: http.Header{},
 	}
 
-	r.SetEncoder(c.config.Encoder)
+	r.SetEncoder(JsonEncoder)
 
 	return r
 }
diff --git a/codec.go b/codec.go
index a8f1aae..a6ca667 100644
--- a/codec.go
+++ b/codec.go
@@ -87,6 +87,7 @@ func FormDecode(r io.Reader, v any) error {
 	var buffer = internal.GetBuffer()
 	var p = buffer.Bytes()[:internal.BufferSize]
 	_, _ = io.CopyBuffer(builder, r, p)
+	internal.PutBuffer(buffer)
 	result, err := url.ParseQuery(builder.String())
 	if err != nil {
 		return errors.WithStack(err)
diff --git a/config.go b/config.go
index 7514339..3122615 100644
--- a/config.go
+++ b/config.go
@@ -49,7 +49,6 @@ type (
 		BeforeFunc BeforeFunc   // 请求前中间件
 		AfterFunc  AfterFunc    // 请求后中间件
 		HTTPClient *http.Client // HTTP客户端
-		Encoder    Encoder      // 编码器
 	}
 
 	Option func(c *config)
@@ -90,10 +89,6 @@ func withInitialize() Option {
 			c.AfterFunc = defaultAfterFunc
 		}
 
-		if c.Encoder == nil {
-			c.Encoder = JsonEncoder
-		}
-
 		if c.HTTPClient == nil {
 			c.HTTPClient = &http.Client{
 				Timeout: defaultTimeout,
diff --git a/contrib/yaml/codec.go b/contrib/yaml/codec.go
index 2b08b1f..8e71553 100644
--- a/contrib/yaml/codec.go
+++ b/contrib/yaml/codec.go
@@ -31,7 +31,5 @@ func (c encoder) ContentType() string {
 }
 
 func Decode(r io.Reader, v any) error {
-	return errors.WithStack(
-		yaml.NewDecoder(r).Decode(v),
-	)
+	return errors.WithStack(yaml.NewDecoder(r).Decode(v))
 }