diff --git a/database.php b/database.php
index 7961967..1ac173d 100644
--- a/database.php
+++ b/database.php
@@ -824,10 +824,18 @@ class Database
     {
         $query = $this->database->prepare (
             'UPDATE `user`' .
-            'SET `about` = ?, `email` = ? ' .
-            'WHERE `id` = ?');
-            
-        $query->execute (array ($about, $email, $user_id));
+            'SET `about` = :about, `email` = :email ' .
+            'WHERE `id` = :user_id');
+        
+        $query->bindValue (':about', $about, PDO::PARAM_STR);
+        $query->bindValue (':user_id', $user_id, PDO::PARAM_INT);
+        
+        if (NULL == $email || '' == $email)
+            $query->bindValue (':email', NULL, PDO::PARAM_NULL);
+        else
+            $query->bindValue (':email', $email, PDO::PARAM_STR);
+        
+        $query->execute ();
     }
     
     /**