diff --git a/context.go b/context.go
index f79bf3ca..9858e8e3 100644
--- a/context.go
+++ b/context.go
@@ -112,7 +112,7 @@ func (c *Context) Render(code int, name string, data interface{}) (err error) {
 	if c.echo.renderer == nil {
 		return RendererNotRegistered
 	}
-	c.response.Header().Set(ContentType, TextHTML)
+	c.response.Header().Set(ContentType, TextHTMLUTF8)
 	c.response.WriteHeader(code)
 	if err = c.echo.renderer.Render(c.response, name, data); err != nil {
 		c.response.clear()
@@ -123,7 +123,7 @@ func (c *Context) Render(code int, name string, data interface{}) (err error) {
 // HTML formats according to a format specifier and sends text/html response with
 // status code.
 func (c *Context) HTML(code int, format string, a ...interface{}) (err error) {
-	c.response.Header().Set(ContentType, TextHTML)
+	c.response.Header().Set(ContentType, TextHTMLUTF8)
 	c.response.WriteHeader(code)
 	if _, err = fmt.Fprintf(c.response, format, a...); err != nil {
 		c.response.clear()
@@ -144,7 +144,7 @@ func (c *Context) String(code int, format string, a ...interface{}) (err error)
 
 // JSON sends an application/json response with status code.
 func (c *Context) JSON(code int, i interface{}) (err error) {
-	c.response.Header().Set(ContentType, ApplicationJSON)
+	c.response.Header().Set(ContentType, ApplicationJSONUTF8)
 	c.response.WriteHeader(code)
 	if err = json.NewEncoder(c.response).Encode(i); err != nil {
 		c.response.clear()
@@ -154,7 +154,7 @@ func (c *Context) JSON(code int, i interface{}) (err error) {
 
 // XML sends an application/xml response with status code.
 func (c *Context) XML(code int, i interface{}) (err error) {
-	c.response.Header().Set(ContentType, ApplicationXML)
+	c.response.Header().Set(ContentType, ApplicationXMLUTF8)
 	c.response.WriteHeader(code)
 	c.response.Write([]byte(xml.Header))
 	if err = xml.NewEncoder(c.response).Encode(i); err != nil {
@@ -172,7 +172,7 @@ func (c *Context) NoContent(code int) error {
 // Redirect redirects the request using http.Redirect with status code.
 func (c *Context) Redirect(code int, url string) error {
 	http.Redirect(c.response, c.request, url, code)
-  return nil
+	return nil
 }
 
 // Error invokes the registered HTTP error handler. Generally used by middleware.
diff --git a/context_test.go b/context_test.go
index 2e4f0a6d..7b79cfd4 100644
--- a/context_test.go
+++ b/context_test.go
@@ -93,7 +93,7 @@ func TestContext(t *testing.T) {
 	err = c.JSON(http.StatusOK, user{"1", "Joe"})
 	if assert.NoError(t, err) {
 		assert.Equal(t, http.StatusOK, rec.Code)
-		assert.Equal(t, ApplicationJSON, rec.Header().Get(ContentType))
+		assert.Equal(t, ApplicationJSONUTF8, rec.Header().Get(ContentType))
 		assert.Equal(t, userJSON, strings.TrimSpace(rec.Body.String()))
 	}
 
@@ -104,7 +104,7 @@ func TestContext(t *testing.T) {
 	err = c.XML(http.StatusOK, user{"1", "Joe"})
 	if assert.NoError(t, err) {
 		assert.Equal(t, http.StatusOK, rec.Code)
-		assert.Equal(t, ApplicationXML, rec.Header().Get(ContentType))
+		assert.Equal(t, ApplicationXMLUTF8, rec.Header().Get(ContentType))
 		assert.Equal(t, xml.Header, xml.Header, rec.Body.String())
 	}
 
@@ -126,7 +126,7 @@ func TestContext(t *testing.T) {
 	err = c.HTML(http.StatusOK, "Hello, <strong>World!</strong>")
 	if assert.NoError(t, err) {
 		assert.Equal(t, http.StatusOK, rec.Code)
-		assert.Equal(t, TextHTML, rec.Header().Get(ContentType))
+		assert.Equal(t, TextHTMLUTF8, rec.Header().Get(ContentType))
 		assert.Equal(t, "Hello, <strong>World!</strong>", rec.Body.String())
 	}
 
diff --git a/echo.go b/echo.go
index cbb8505b..e3de19c7 100644
--- a/echo.go
+++ b/echo.go
@@ -91,15 +91,22 @@ const (
 	// Media types
 	//-------------
 
-	ApplicationJSON     = "application/json; charset=utf-8"
-	ApplicationXML      = "application/xml; charset=utf-8"
+	ApplicationJSON     = "application/json"
+	ApplicationJSONUTF8 = "application/json; " + UTF8
+	ApplicationXML      = "application/xml"
+	ApplicationXMLUTF8  = "application/xml; " + UTF8
 	ApplicationForm     = "application/x-www-form-urlencoded"
 	ApplicationProtobuf = "application/protobuf"
 	ApplicationMsgpack  = "application/msgpack"
-	TextHTML            = "text/html; charset=utf-8"
-	TextPlain           = "text/plain; charset=utf-8"
+	TextHTML            = "text/html"
+	TextHTMLUTF8        = "text/html; " + UTF8
+	TextPlain           = "text/plain"
+	TextPlainUTF8       = "text/plain; " + UTF8
 	MultipartForm       = "multipart/form-data"
 
+	// Charset
+	UTF8 = "charset=utf-8"
+
 	//---------
 	// Headers
 	//---------
@@ -180,9 +187,9 @@ func New() (e *Echo) {
 	e.SetBinder(func(r *http.Request, v interface{}) error {
 		ct := r.Header.Get(ContentType)
 		err := UnsupportedMediaType
-		if strings.HasPrefix(ApplicationJSON, ct) {
+		if strings.HasPrefix(ct, ApplicationJSON) {
 			err = json.NewDecoder(r.Body).Decode(v)
-		} else if strings.HasPrefix(ApplicationXML, ct) {
+		} else if strings.HasPrefix(ct, ApplicationXML) {
 			err = xml.NewDecoder(r.Body).Decode(v)
 		}
 		return err