diff --git a/Tranga/Manga.cs b/Tranga/Manga.cs
index c03e403..ea7298a 100644
--- a/Tranga/Manga.cs
+++ b/Tranga/Manga.cs
@@ -72,7 +72,7 @@ public Manga(MangaConnector mangaConnector, string sortName, List<string> author
         this.latestChapterDownloaded = 0;
         this.latestChapterAvailable = 0;
         this.releaseStatus = releaseStatus;
-        this.websiteUrl = websiteUrl;
+        this.websiteUrl = websiteUrl??"";
     }
 
     public Manga WithMetadata(Manga newManga)