diff --git a/extensions/yii/authclient/OAuth1.php b/extensions/yii/authclient/OAuth1.php
index 11c99e8..e68118d 100644
--- a/extensions/yii/authclient/OAuth1.php
+++ b/extensions/yii/authclient/OAuth1.php
@@ -298,6 +298,7 @@ class OAuth1 extends BaseOAuth
 	protected function composeSignatureBaseString($method, $url, array $params)
 	{
 		unset($params['oauth_signature']);
+		uksort($params, 'strcmp'); // Parameters are sorted by name, using lexicographical byte value ordering. Ref: Spec: 9.1.1
 		$parts = [
 			strtoupper($method),
 			$url,