diff --git a/src/SuffixExtractor.php b/src/SuffixExtractor.php
index <HASH>..<HASH> 100644
--- a/src/SuffixExtractor.php
+++ b/src/SuffixExtractor.php
@@ -113,7 +113,7 @@ class SuffixExtractor
             }
         }
 
-        return [$host, ''];
+        return [$host, null];
     }
Fix to result: null on incorrect TLD now