diff --git a/client.go b/client.go
index 56e4469c..82454fe2 100644
--- a/client.go
+++ b/client.go
@@ -58,7 +58,7 @@ var (
 	hdrAuthorizationKey   = http.CanonicalHeaderKey("Authorization")
 
 	plainTextType   = "text/plain; charset=utf-8"
-	jsonContentType = "application/json; charset=utf-8"
+	jsonContentType = "application/json"
 	formContentType = "application/x-www-form-urlencoded"
 
 	jsonCheck = regexp.MustCompile(`(?i:(application|text)/(json|.*\+json|json\-.*)(;|$))`)
diff --git a/client_test.go b/client_test.go
index 34b174f4..b3e63cda 100644
--- a/client_test.go
+++ b/client_test.go
@@ -241,12 +241,12 @@ func TestClientOptions(t *testing.T) {
 	client.SetHostURL("http://httpbin.org")
 	assertEqual(t, "http://httpbin.org", client.HostURL)
 
-	client.SetHeader(hdrContentTypeKey, jsonContentType)
+	client.SetHeader(hdrContentTypeKey, "application/json; charset=utf-8")
 	client.SetHeaders(map[string]string{
 		hdrUserAgentKey: "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_5) go-resty v0.1",
 		"X-Request-Id":  strconv.FormatInt(time.Now().UnixNano(), 10),
 	})
-	assertEqual(t, jsonContentType, client.Header.Get(hdrContentTypeKey))
+	assertEqual(t, "application/json; charset=utf-8", client.Header.Get(hdrContentTypeKey))
 
 	client.SetCookie(&http.Cookie{
 		Name:     "default-cookie",
diff --git a/request_test.go b/request_test.go
index b2eaa8af..47e2b372 100644
--- a/request_test.go
+++ b/request_test.go
@@ -120,8 +120,8 @@ func TestPostJSONStringSuccess(t *testing.T) {
 	defer ts.Close()
 
 	c := dc()
-	c.SetHeader(hdrContentTypeKey, jsonContentType).
-		SetHeaders(map[string]string{hdrUserAgentKey: "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_5) go-resty v0.1", hdrAcceptKey: jsonContentType})
+	c.SetHeader(hdrContentTypeKey, "application/json; charset=utf-8").
+		SetHeaders(map[string]string{hdrUserAgentKey: "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_5) go-resty v0.1", hdrAcceptKey: "application/json; charset=utf-8"})
 
 	resp, err := c.R().
 		SetBody(`{"username":"testuser", "password":"testpass"}`).
@@ -148,8 +148,8 @@ func TestPostJSONBytesSuccess(t *testing.T) {
 	defer ts.Close()
 
 	c := dc()
-	c.SetHeader(hdrContentTypeKey, jsonContentType).
-		SetHeaders(map[string]string{hdrUserAgentKey: "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_5) go-resty v0.7", hdrAcceptKey: jsonContentType})
+	c.SetHeader(hdrContentTypeKey, "application/json; charset=utf-8").
+		SetHeaders(map[string]string{hdrUserAgentKey: "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_5) go-resty v0.7", hdrAcceptKey: "application/json; charset=utf-8"})
 
 	resp, err := c.R().
 		SetBody([]byte(`{"username":"testuser", "password":"testpass"}`)).
@@ -166,7 +166,7 @@ func TestPostJSONBytesIoReader(t *testing.T) {
 	defer ts.Close()
 
 	c := dc()
-	c.SetHeader(hdrContentTypeKey, jsonContentType)
+	c.SetHeader(hdrContentTypeKey, "application/json; charset=utf-8")
 
 	bodyBytes := []byte(`{"username":"testuser", "password":"testpass"}`)
 
@@ -188,7 +188,7 @@ func TestPostJSONStructSuccess(t *testing.T) {
 
 	c := dc().SetJSONEscapeHTML(false)
 	resp, err := c.R().
-		SetHeader(hdrContentTypeKey, jsonContentType).
+		SetHeader(hdrContentTypeKey, "application/json; charset=utf-8").
 		SetBody(user).
 		SetResult(&AuthSuccess{}).
 		Post(ts.URL + "/login")
@@ -231,7 +231,7 @@ func TestPostJSONStructInvalidLogin(t *testing.T) {
 	c.SetDebug(false)
 
 	resp, err := c.R().
-		SetHeader(hdrContentTypeKey, jsonContentType).
+		SetHeader(hdrContentTypeKey, "application/json; charset=utf-8").
 		SetBody(User{Username: "testuser", Password: "testpass1"}).
 		SetError(AuthError{}).
 		SetJSONEscapeHTML(false).
@@ -254,7 +254,7 @@ func TestPostJSONErrorRFC7807(t *testing.T) {
 
 	c := dc()
 	resp, err := c.R().
-		SetHeader(hdrContentTypeKey, jsonContentType).
+		SetHeader(hdrContentTypeKey, "application/json; charset=utf-8").
 		SetBody(User{Username: "testuser", Password: "testpass1"}).
 		SetError(AuthError{}).
 		Post(ts.URL + "/login?ct=problem")
@@ -828,7 +828,7 @@ func TestPutJSONString(t *testing.T) {
 	client.outputLogTo(ioutil.Discard)
 
 	resp, err := client.R().
-		SetHeaders(map[string]string{hdrContentTypeKey: jsonContentType, hdrAcceptKey: jsonContentType}).
+		SetHeaders(map[string]string{hdrContentTypeKey: "application/json; charset=utf-8", hdrAcceptKey: "application/json; charset=utf-8"}).
 		SetBody(`{"content":"json content sending to server"}`).
 		Put(ts.URL + "/json")
 
diff --git a/resty_test.go b/resty_test.go
index ab534ca0..31865315 100644
--- a/resty_test.go
+++ b/resty_test.go
@@ -131,7 +131,7 @@ func handleLoginEndpoint(t *testing.T, w http.ResponseWriter, r *http.Request) {
 			} else if r.URL.Query().Get("ct") == "rpc" {
 				w.Header().Set(hdrContentTypeKey, "application/json-rpc")
 			} else {
-				w.Header().Set(hdrContentTypeKey, jsonContentType)
+				w.Header().Set(hdrContentTypeKey, "application/json")
 			}
 
 			if err != nil {
@@ -192,7 +192,7 @@ func handleUsersEndpoint(t *testing.T, w http.ResponseWriter, r *http.Request) {
 			var users []ExampleUser
 			jd := json.NewDecoder(r.Body)
 			err := jd.Decode(&users)
-			w.Header().Set(hdrContentTypeKey, jsonContentType)
+			w.Header().Set(hdrContentTypeKey, "application/json")
 			if err != nil {
 				t.Logf("Error: %v", err)
 				w.WriteHeader(http.StatusBadRequest)
@@ -240,7 +240,7 @@ func createPostServer(t *testing.T) *httptest.Server {
 							t.Errorf("Error: could not read post body: %s", err.Error())
 						}
 						t.Logf("Got query param: status=500 so we're returning the post body as response and a 500 status code. body: %s", string(body))
-						w.Header().Set(hdrContentTypeKey, jsonContentType)
+						w.Header().Set(hdrContentTypeKey, "application/json; charset=utf-8")
 						w.WriteHeader(http.StatusInternalServerError)
 						_, _ = w.Write(body)
 						return
@@ -249,7 +249,7 @@ func createPostServer(t *testing.T) *httptest.Server {
 					var users []map[string]interface{}
 					jd := json.NewDecoder(r.Body)
 					err := jd.Decode(&users)
-					w.Header().Set(hdrContentTypeKey, jsonContentType)
+					w.Header().Set(hdrContentTypeKey, "application/json; charset=utf-8")
 					if err != nil {
 						t.Logf("Error: %v", err)
 						w.WriteHeader(http.StatusBadRequest)
@@ -391,7 +391,7 @@ func createAuthServer(t *testing.T) *httptest.Server {
 				auth := r.Header.Get("Authorization")
 				t.Logf("Bearer Auth: %v", auth)
 
-				w.Header().Set(hdrContentTypeKey, jsonContentType)
+				w.Header().Set(hdrContentTypeKey, "application/json; charset=utf-8")
 
 				if !strings.HasPrefix(auth, "Bearer ") {
 					w.Header().Set("Www-Authenticate", "Protected Realm")
@@ -414,7 +414,7 @@ func createAuthServer(t *testing.T) *httptest.Server {
 				auth := r.Header.Get("Authorization")
 				t.Logf("Basic Auth: %v", auth)
 
-				w.Header().Set(hdrContentTypeKey, jsonContentType)
+				w.Header().Set(hdrContentTypeKey, "application/json; charset=utf-8")
 
 				password, err := base64.StdEncoding.DecodeString(auth[6:])
 				if err != nil || string(password) != "myuser:basicauth" {
@@ -472,7 +472,7 @@ func createGenServer(t *testing.T) *httptest.Server {
 			if r.URL.Path == "/plaintext" {
 				_, _ = w.Write([]byte("TestPut: plain text response"))
 			} else if r.URL.Path == "/json" {
-				w.Header().Set(hdrContentTypeKey, jsonContentType)
+				w.Header().Set(hdrContentTypeKey, "application/json; charset=utf-8")
 				_, _ = w.Write([]byte(`{"response":"json response"}`))
 			} else if r.URL.Path == "/xml" {
 				w.Header().Set(hdrContentTypeKey, "application/xml")