diff --git a/wchat/common/HttpClient.php b/wchat/common/HttpClient.php
index ace369d..ec4546c 100644
--- a/wchat/common/HttpClient.php
+++ b/wchat/common/HttpClient.php
@@ -695,7 +695,6 @@ class HttpClient
 			if (!is_string($data)) {
 				curl_setopt($ch, CURLOPT_POSTFIELDS, $this->mergeParams($data));
 			} else {
-				var_dump($data);
 				curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
 			}
 		}
@@ -785,7 +784,7 @@ class HttpClient
 		if (is_array($body)) {
 			return $body;
 		}
-		$type = $data['content-type'] ?? $data['Content-Type'] ?? 'text/html';
+		$type = isset($data['content-type']) ? $data['content-type'] : (isset($data['Content-Type']) ? $data['Content-Type'] : 'text/html');
 		if (strpos($type, 'text/html') !== false) {
 			return $body;
 		} else if (strpos($type, 'json') !== false) {