diff --git a/robyn/authentication.py b/robyn/authentication.py
index dc01edf74..b2f6e8345 100644
--- a/robyn/authentication.py
+++ b/robyn/authentication.py
@@ -1,5 +1,5 @@
 from abc import ABC, abstractmethod
-from typing import Optional
+from typing import Any, Coroutine, Optional, Union
 
 from robyn.robyn import Headers, Identity, Request, Response
 from robyn.status_codes import HTTP_401_UNAUTHORIZED
@@ -64,7 +64,7 @@ def unauthorized_response(self) -> Response:
         )
 
     @abstractmethod
-    def authenticate(self, request: Request) -> Optional[Identity]:
+    def authenticate(self, request: Request) -> Union[Optional[Identity], Coroutine[Any, Any, Optional[Identity]]]:
         """
         Authenticates the user.
         :param request: The request object.
diff --git a/robyn/router.py b/robyn/router.py
index 83af186f9..dc4b40d15 100644
--- a/robyn/router.py
+++ b/robyn/router.py
@@ -289,16 +289,32 @@ def add_auth_middleware(self, endpoint: str):
         injected_dependencies: dict = {}
 
         def decorator(handler):
-            @wraps(handler)
-            def inner_handler(request: Request, *args):
-                if not self.authentication_handler:
-                    raise AuthenticationNotConfiguredError()
-                identity = self.authentication_handler.authenticate(request)
-                if identity is None:
-                    return self.authentication_handler.unauthorized_response
-                request.identity = identity
-
-                return request
+            if inspect.iscoroutinefunction(self.authentication_handler.authenticate):
+
+                @wraps(handler)
+                async def inner_handler(request: Request, *args):
+                    if not self.authentication_handler:
+                        raise AuthenticationNotConfiguredError()
+
+                    identity = await self.authentication_handler.authenticate(request)
+                    if identity is None:
+                        return self.authentication_handler.unauthorized_response
+                    request.identity = identity
+
+                    return request
+            else:
+
+                @wraps(handler)
+                def inner_handler(request: Request, *args):
+                    if not self.authentication_handler:
+                        raise AuthenticationNotConfiguredError()
+
+                    identity = self.authentication_handler.authenticate(request)
+                    if identity is None:
+                        return self.authentication_handler.unauthorized_response
+                    request.identity = identity
+
+                    return request
 
             self.add_route(
                 MiddlewareType.BEFORE_REQUEST,