diff --git a/blockchain/binance/client.go b/blockchain/binance/client.go
index 5cc327e..d0babf9 100644
--- a/blockchain/binance/client.go
+++ b/blockchain/binance/client.go
@@ -13,8 +13,8 @@ type Client struct {
 	req client.Request
 }
 
-func InitClient(url, apiKey string) Client {
-	request := client.InitJSONClient(url)
+func InitClient(url, apiKey string, errorHandler client.HttpErrorHandler) Client {
+	request := client.InitJSONClient(url, errorHandler)
 	request.AddHeader("apikey", apiKey)
 	return Client{
 		req: request,
diff --git a/client/client.go b/client/client.go
index 2e79aea..ce5fab0 100644
--- a/client/client.go
+++ b/client/client.go
@@ -15,36 +15,37 @@ import (
 )
 
 type Request struct {
-	BaseUrl      string
-	Headers      map[string]string
-	HttpClient   *http.Client
-	ErrorHandler func(res *http.Response, uri string) error
+	BaseUrl          string
+	Headers          map[string]string
+	HttpClient       *http.Client
+	HttpErrorHandler HttpErrorHandler
 }
 
+type HttpErrorHandler func(res *http.Response, uri string) error
+
 func (r *Request) SetTimeout(seconds time.Duration) {
 	r.HttpClient.Timeout = time.Second * seconds
 }
 
-func InitClient(baseUrl string) Request {
+func InitClient(baseUrl string, errorHandler HttpErrorHandler) Request {
+	if errorHandler == nil {
+		errorHandler = DefaultErrorHandler
+	}
 	return Request{
-		Headers:      make(map[string]string),
-		HttpClient:   DefaultClient,
-		ErrorHandler: DefaultErrorHandler,
-		BaseUrl:      baseUrl,
+		Headers:          make(map[string]string),
+		HttpClient:       DefaultClient,
+		HttpErrorHandler: errorHandler,
+		BaseUrl:          baseUrl,
 	}
 }
 
-func InitJSONClient(baseUrl string) Request {
-	headers := map[string]string{
+func InitJSONClient(baseUrl string, errorHandler HttpErrorHandler) Request {
+	client := InitClient(baseUrl, errorHandler)
+	client.Headers = map[string]string{
 		"Content-Type": "application/json",
 		"Accept":       "application/json",
 	}
-	return Request{
-		Headers:      headers,
-		HttpClient:   DefaultClient,
-		ErrorHandler: DefaultErrorHandler,
-		BaseUrl:      baseUrl,
-	}
+	return client
 }
 
 var DefaultClient = &http.Client{
@@ -112,7 +113,7 @@ func (r *Request) Execute(method string, url string, body io.Reader, result inte
 		return err
 	}
 
-	err = r.ErrorHandler(res, url)
+	err = r.HttpErrorHandler(res, url)
 	if err != nil {
 		return err
 	}
diff --git a/client/client_test.go b/client/client_test.go
index d390ade..0d24d9c 100644
--- a/client/client_test.go
+++ b/client/client_test.go
@@ -57,7 +57,7 @@ func TestRequest_GetBase(t *testing.T) {
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
-			r := InitClient(tt.fields.baseUrl)
+			r := InitClient(tt.fields.baseUrl, nil)
 			if got := r.GetBase(tt.path); got != tt.want {
 				t.Errorf("Request.GetBase() = %v, want %v", got, tt.want)
 			}
diff --git a/mock/mock_test.go b/mock/mock_test.go
index 4336a71..98c668d 100644
--- a/mock/mock_test.go
+++ b/mock/mock_test.go
@@ -26,7 +26,7 @@ func TestCreateMockedAPI(t *testing.T) {
 
 	server := httptest.NewServer(CreateMockedAPI(data))
 	defer server.Close()
-	client := client.InitClient(server.URL)
+	client := client.InitClient(server.URL, nil)
 
 	var resp response
 	err := client.Get(&resp, "1", nil)