diff --git a/fimfarchive/fetchers/directory.py b/fimfarchive/fetchers/directory.py
index 1fb2025..c5443cb 100644
--- a/fimfarchive/fetchers/directory.py
+++ b/fimfarchive/fetchers/directory.py
@@ -25,7 +25,7 @@ Directory fetcher.
 import json
 from itertools import chain
 from pathlib import Path
-from typing import Any, Dict, Iterable, Optional, Set
+from typing import Any, Dict, Iterable, Iterator, Optional, Set
 
 from fimfarchive.exceptions import InvalidStoryError, StorySourceError
 from fimfarchive.flavors import Flavor
@@ -64,7 +64,7 @@ class DirectoryFetcher(Fetcher):
         self.data_path = data_path
         self.flavors = frozenset(flavors)
 
-    def iter_path_keys(self, path: Optional[Path]) -> Iterable[int]:
+    def iter_path_keys(self, path: Optional[Path]) -> Iterator[int]:
         """
         Yields all story keys found in the specified directory.
 
@@ -113,7 +113,7 @@ class DirectoryFetcher(Fetcher):
         """
         return len(self.list_keys())
 
-    def __iter__(self) -> Iterable[Story]:
+    def __iter__(self) -> Iterator[Story]:
         """
         Yields all stories in the directories, ordered by ID.
         """
diff --git a/fimfarchive/fetchers/fimfarchive.py b/fimfarchive/fetchers/fimfarchive.py
index a2c48af..eab3208 100644
--- a/fimfarchive/fetchers/fimfarchive.py
+++ b/fimfarchive/fetchers/fimfarchive.py
@@ -23,7 +23,7 @@ Fimfarchive fetcher.
 
 
 import json
-from typing import cast, Any, Dict, IO, Iterable, Optional, Tuple, Union
+from typing import cast, Any, Dict, IO, Iterator, Optional, Tuple, Union
 from zipfile import ZipFile, BadZipFile
 
 from boltons.cacheutils import LRU
@@ -107,7 +107,7 @@ class FimfarchiveFetcher(Fetcher):
         self.paths = LRU()
         self.is_open = True
 
-    def load_index(self, source: IO[bytes]) -> Iterable[Tuple[int, str]]:
+    def load_index(self, source: IO[bytes]) -> Iterator[Tuple[int, str]]:
         """
         Yields unparsed index items from a byte stream.
 
@@ -147,7 +147,7 @@ class FimfarchiveFetcher(Fetcher):
         """
         return len(self.index)
 
-    def __iter__(self) -> Iterable[Story]:
+    def __iter__(self) -> Iterator[Story]:
         """
         Yields all stories in the archive, ordered by ID.
         """