diff --git a/third_party/2and3/yaml/__init__.pyi b/third_party/2and3/yaml/__init__.pyi
index 8f2edec58..9a9e9d932 100644
--- a/third_party/2and3/yaml/__init__.pyi
+++ b/third_party/2and3/yaml/__init__.pyi
@@ -1,4 +1,4 @@
-from typing import Any
+from typing import Any, Iterator, Union, IO
 from yaml.error import *  # noqa: F403
 from yaml.tokens import *  # noqa: F403
 from yaml.events import *  # noqa: F403
@@ -14,10 +14,10 @@ def scan(stream, Loader=...): ...
 def parse(stream, Loader=...): ...
 def compose(stream, Loader=...): ...
 def compose_all(stream, Loader=...): ...
-def load(stream, Loader=...): ...
-def load_all(stream, Loader=...): ...
-def safe_load(stream): ...
-def safe_load_all(stream): ...
+def load(stream: Union[str, IO[str]], Loader: Loader=...) -> Any: ...
+def load_all(stream: Union[str, IO[str]], Loader: Loader=...) -> Iterator[Any]: ...
+def safe_load(stream: Union[str, IO[str]]) -> Any: ...
+def safe_load_all(stream: Union[str, IO[str]]) -> Iterator[Any]: ...
 def emit(events, stream=..., Dumper=..., canonical=..., indent=..., width=..., allow_unicode=..., line_break=...): ...
 def serialize_all(nodes, stream=..., Dumper=..., canonical=..., indent=..., width=..., allow_unicode=..., line_break=..., encoding=..., explicit_start=..., explicit_end=..., version=..., tags=...): ...
 def serialize(node, stream=..., Dumper=..., **kwds): ...