diff --git a/src/blackd/middlewares.py b/src/blackd/middlewares.py
index 370e0ae222e..bc9fc8ff9fd 100644
--- a/src/blackd/middlewares.py
+++ b/src/blackd/middlewares.py
@@ -3,10 +3,19 @@
 from aiohttp.web_request import Request
 from aiohttp.web_response import StreamResponse
 
+Handler = Callable[[Request], Awaitable[StreamResponse]]
+
 if TYPE_CHECKING:
+    from aiohttp.typedefs import Middleware
+
     F = TypeVar("F", bound=Callable[..., Any])
     middleware: Callable[[F], F]
 else:
+    try:
+        from aiohttp.typedefs import Middleware
+    except ImportError:
+        Middleware = Callable[[Request, Handler], Awaitable[StreamResponse]]
+
     try:
         from aiohttp.web_middlewares import middleware
     except ImportError:
@@ -14,9 +23,6 @@
         # so if it doesn't exist anymore, define a no-op for forward compatibility.
         middleware = lambda x: x  # noqa: E731
 
-Handler = Callable[[Request], Awaitable[StreamResponse]]
-Middleware = Callable[[Request, Handler], Awaitable[StreamResponse]]
-
 
 def cors(allow_headers: Iterable[str]) -> Middleware:
     @middleware