diff --git a/client/client.go b/client/client.go
index 44070c0..f590550 100644
--- a/client/client.go
+++ b/client/client.go
@@ -154,7 +154,6 @@ func parameterToJson(obj interface{}) (string, error) {
 	return string(jsonBuf), err
 }
 
-
 // callAPI do the request.
 func (c *APIClient) callAPI(request *http.Request) (*http.Response, error) {
 	return c.cfg.HTTPClient.Do(request)
@@ -329,6 +328,9 @@ func (c *APIClient) prepareRequest(
 }
 
 func (c *APIClient) decode(v interface{}, b []byte, contentType string) (err error) {
+	if len(b) == 0 {
+		return nil
+	}
 	if s, ok := v.(*string); ok {
 		*s = string(b)
 		return nil