diff --git a/wchat/officialaccount/Tag.php b/wchat/officialaccount/Tag.php
index 99e5130..a373d7c 100644
--- a/wchat/officialaccount/Tag.php
+++ b/wchat/officialaccount/Tag.php
@@ -23,11 +23,12 @@ class Tag extends AfficialAccount
 	 */
 	public function generate($tagName)
 	{
-		$params['tag'] = ['name' => $tagName];
+		$params['tag[name]'] = $tagName;
 
 		$config = $this->config->getAccessToken();
 
-		$result = $this->request->post($this->generate_url . $config, $params);
+		$this->request->setData(json_encode($params));
+		$result = $this->request->post($this->generate_url . $config);
 		$this->request->setErrorField('errcode');
 		$this->request->setErrorMsgField('errmsg');
 		if (!$result->isResultsOK()) {