diff --git a/third_party/3/itsdangerous.pyi b/third_party/3/itsdangerous.pyi
index 445c998b3..96d7ccfee 100644
--- a/third_party/3/itsdangerous.pyi
+++ b/third_party/3/itsdangerous.pyi
@@ -1,7 +1,7 @@
 from datetime import datetime
 from typing import Any, Callable, IO, MutableMapping, Optional, Text, Tuple, TypeVar, Union
 
-PY2 = ...  # type: bool
+PY2: bool
 text_type = str
 int_to_byte = Callable[[int], bytes]
 number_types = (int, float)
@@ -82,7 +82,7 @@ class Signer:
     def get_signature(self, value: _bytes_like) -> bytes: ...
     def sign(self, value: _bytes_like) -> bytes: ...
     def verify_signature(self, value: _bytes_like, sig: _can_become_bytes) -> bool: ...
-    def unsign(self, signed_value: _can_become_bytes) -> str: ...
+    def unsign(self, signed_value: _bytes_like) -> bytes: ...
     def validate(self, signed_value: _can_become_bytes) -> bool: ...
 
 class TimestampSigner(Signer):