Meta tag description not working

Default value was not working. I set description from controller and that worked for og:description, but the meta tag description content was empty for {!! Meta::tag('description'); !!}.

src/Torann/LaravelMetaTags/MetaTag.php

@@ -127,7 +127,7 @@ public function tag($key, $value = '')
     {
         return $this->createTag([
             'name' => $key,
-            'content' => $value
+            'content' => $value?:$this->metas[$key]
         ]);
     }