diff --git a/audiobookdl/sources/storytel.py b/audiobookdl/sources/storytel.py
index 40a0fc7..a586b1e 100644
--- a/audiobookdl/sources/storytel.py
+++ b/audiobookdl/sources/storytel.py
@@ -165,7 +165,7 @@ def get_chapters(self, book_info) -> List[Chapter]:
 
 
     def download_cover(self, book_info) -> Cover:
-        isbn = book_info["abook"]["iisbn"]
+        isbn = book_info["abook"]["isbn"]
         cover_url = f"https://www.storytel.com/images/{isbn}/640x640/cover.jpg"
         cover_data = self.get(cover_url)
         return Cover(cover_data, "jpg")