diff --git a/third_party/2and3/requests/structures.pyi b/third_party/2and3/requests/structures.pyi
index ad9044f2b..9956e9c5a 100644
--- a/third_party/2and3/requests/structures.pyi
+++ b/third_party/2and3/requests/structures.pyi
@@ -1,9 +1,11 @@
-from typing import Any, Iterator, MutableMapping, Text, Tuple, Union
+from typing import Any, Iterator, MutableMapping, Tuple, TypeVar, Generic
 
-class CaseInsensitiveDict(MutableMapping[str, Union[Text, bytes]]):
-    def lower_items(self) -> Iterator[Tuple[str, Union[Text, bytes]]]: ...
-    def __setitem__(self, key: str, value: Union[Text, bytes]) -> None: ...
-    def __getitem__(self, key: str) -> Union[Text, bytes]: ...
+_VT = TypeVar('_VT')
+
+class CaseInsensitiveDict(MutableMapping[str, _VT], Generic[_VT]):
+    def lower_items(self) -> Iterator[Tuple[str, _VT]]: ...
+    def __setitem__(self, key: str, value: _VT) -> None: ...
+    def __getitem__(self, key: str) -> _VT: ...
     def __delitem__(self, key: str) -> None: ...
     def __iter__(self) -> Iterator[str]: ...
     def __len__(self) -> int: ...