---
 aiohttp/helpers.py           |    5 ++++-
 aiohttp/tracing.py           |    5 ++++-
 aiohttp/web_urldispatcher.py |    5 ++++-
 setup.py                     |    2 +-
 4 files changed, 13 insertions(+), 4 deletions(-)

--- a/aiohttp/helpers.py
+++ b/aiohttp/helpers.py
@@ -45,7 +45,10 @@ from urllib.request import getproxies
 import async_timeout
 import attr
 from multidict import MultiDict, MultiDictProxy
-from typing_extensions import Protocol
+try:
+    from typing import Protocol
+except (ImportError, ModuleNotFoundError):
+    from typing_extensions import Protocol
 from yarl import URL
 
 from . import hdrs
--- a/aiohttp/tracing.py
+++ b/aiohttp/tracing.py
@@ -9,7 +9,10 @@ from .client_reqrep import ClientRespons
 from .signals import Signal
 
 if TYPE_CHECKING:  # pragma: no cover
-    from typing_extensions import Protocol
+    try:
+        from typing import Protocol
+    except (ImportError, ModuleNotFoundError):
+        from typing_extensions import Protocol
 
     from .client import ClientSession
 
--- a/aiohttp/web_urldispatcher.py
+++ b/aiohttp/web_urldispatcher.py
@@ -33,7 +33,10 @@ from typing import (
     cast,
 )
 
-from typing_extensions import TypedDict
+try:
+    from typing import TypedDict
+except (ImportError, ModuleNotFoundError):
+    from typing_extensions import TypedDict
 from yarl import URL, __version__ as yarl_version  # type: ignore
 
 from . import hdrs
--- a/setup.py
+++ b/setup.py
@@ -70,7 +70,7 @@ install_requires = [
     "async_timeout>=3.0,<4.0",
     "yarl>=1.0,<2.0",
     'idna-ssl>=1.0; python_version<"3.7"',
-    "typing_extensions>=3.6.5",
+    'typing_extensions>=3.7.4; python_version<"3.8"',
 ]