diff --git a/application/common/models/EmailLog.php b/application/common/models/EmailLog.php
index 1a436870..9b8a98cc 100644
--- a/application/common/models/EmailLog.php
+++ b/application/common/models/EmailLog.php
@@ -47,7 +47,7 @@ public function attributeLabels()
         ]);
     }
 
-    public static function getMessageTypes()
+    public static function getMessageTypes(): array
     {
         $reflectionClass = new ReflectionClass(__CLASS__);
         $messageTypes = [];