diff --git a/comiclib/scanner/21-hath.py b/comiclib/scanner/21-hath.py
index 1cb57e3..1ca988a 100644
--- a/comiclib/scanner/21-hath.py
+++ b/comiclib/scanner/21-hath.py
@@ -10,7 +10,12 @@ class Scanner:
     def scan(self, path: Path, id: str, metadata: dict, prev_scanners: list[str]) -> bool:
         if path.is_dir() and (path / 'galleryinfo.txt').exists():
             logger.info(f' <- {path}')
-            metadata["source"] = 'https://exhentai.org/g/' + re.search(r"\[(\d+)\]$", path.name)[1] + '/'
+            if (match := re.search(r"\[(\d+)\]$", path.name, re.ASCII)) is not None:
+                metadata["source"] = 'https://exhentai.org/g/' + match[1] + '/'
+            elif re.fullmatch(r"\d+", path.name, re.ASCII) is not None:
+                metadata["source"] = 'https://exhentai.org/g/' + path.name + '/'
+            else:
+                raise Exception(f"Unknow hath folder name: {path.name}")
             information = (path / 'galleryinfo.txt').read_text().splitlines()
             _key, _, title = information[0].partition(':')
             assert _key == 'Title'
@@ -24,4 +29,4 @@ def scan(self, path: Path, id: str, metadata: dict, prev_scanners: list[str]) ->
             metadata["pagecount"] = len(list(path.iterdir())) - 1
             return True
         else:
-            return False
\ No newline at end of file
+            return False