diff --git a/wchat/common/HttpClient.php b/wchat/common/HttpClient.php
index 8972fcc..697b2ea 100644
--- a/wchat/common/HttpClient.php
+++ b/wchat/common/HttpClient.php
@@ -710,7 +710,7 @@ class HttpClient
 		if (is_array($body)) {
 			return $body;
 		}
-		$type = $data['Content-Type'] ?? 'text/html';
+		$type = $data['content-type'] ?? 'text/html';
 		if (strpos($type, 'text/html') !== false) {
 			return $body;
 		} else if (strpos($type, 'json') !== false) {
diff --git a/wchat/wx/PublicTemplate.php b/wchat/wx/PublicTemplate.php
index 1547f2c..b7c92a0 100644
--- a/wchat/wx/PublicTemplate.php
+++ b/wchat/wx/PublicTemplate.php
@@ -142,9 +142,6 @@ class PublicTemplate extends SmallProgram
 		if (!empty($this->miniprogram)) {
 			$default['miniprogram'] = $this->miniprogram;
 		}
-
-		$params = json_encode($default, JSON_UNESCAPED_UNICODE);
-
 		$this->request->setIsSSL(true);
 		$this->request->addHeader('Content-Type', 'application/json');
 		$this->request->setErrorField('errcode');