diff --git a/libraries/microsoft-agents-hosting-aiohttp/microsoft_agents/hosting/aiohttp/cloud_adapter.py b/libraries/microsoft-agents-hosting-aiohttp/microsoft_agents/hosting/aiohttp/cloud_adapter.py
index 17aef2f3..234cd679 100644
--- a/libraries/microsoft-agents-hosting-aiohttp/microsoft_agents/hosting/aiohttp/cloud_adapter.py
+++ b/libraries/microsoft-agents-hosting-aiohttp/microsoft_agents/hosting/aiohttp/cloud_adapter.py
@@ -68,4 +68,5 @@ def _to_aiohttp_response(http_response: HttpResponse) -> Response:
         return Response(
             status=http_response.status_code,
             headers=http_response.headers,
+            content_type=http_response.content_type,
         )
diff --git a/libraries/microsoft-agents-hosting-core/microsoft_agents/hosting/core/__init__.py b/libraries/microsoft-agents-hosting-core/microsoft_agents/hosting/core/__init__.py
index be36ce81..2b9e817f 100644
--- a/libraries/microsoft-agents-hosting-core/microsoft_agents/hosting/core/__init__.py
+++ b/libraries/microsoft-agents-hosting-core/microsoft_agents/hosting/core/__init__.py
@@ -133,7 +133,7 @@
     "InputFile",
     "InputFileDownloader",
     "Query",
-    "Route",
+    "_Route",
     "RouteHandler",
     "TypingIndicator",
     "Citation",
diff --git a/libraries/microsoft-agents-hosting-core/microsoft_agents/hosting/core/http/_http_request_protocol.py b/libraries/microsoft-agents-hosting-core/microsoft_agents/hosting/core/http/_http_request_protocol.py
index c3874987..0170c59f 100644
--- a/libraries/microsoft-agents-hosting-core/microsoft_agents/hosting/core/http/_http_request_protocol.py
+++ b/libraries/microsoft-agents-hosting-core/microsoft_agents/hosting/core/http/_http_request_protocol.py
@@ -3,7 +3,7 @@
 
 """Protocol for abstracting HTTP request objects across frameworks."""
 
-from typing import Protocol, Any, Optional
+from typing import Protocol, Any, Optional, Mapping
 
 
 class HttpRequestProtocol(Protocol):
@@ -19,7 +19,7 @@ def method(self) -> str:
         ...
 
     @property
-    def headers(self) -> dict[str, str]:
+    def headers(self) -> Mapping[str, str]:
         """Request headers."""
         ...
 
diff --git a/libraries/microsoft-agents-hosting-core/microsoft_agents/hosting/core/http/_http_response.py b/libraries/microsoft-agents-hosting-core/microsoft_agents/hosting/core/http/_http_response.py
index b1a5dc46..bfe1cab5 100644
--- a/libraries/microsoft-agents-hosting-core/microsoft_agents/hosting/core/http/_http_response.py
+++ b/libraries/microsoft-agents-hosting-core/microsoft_agents/hosting/core/http/_http_response.py
@@ -4,7 +4,7 @@
 """HTTP response abstraction."""
 
 from dataclasses import dataclass
-from typing import Any, Optional
+from typing import Any
 
 
 @dataclass
@@ -12,9 +12,9 @@ class HttpResponse:
     """Framework-agnostic HTTP response."""
 
     status_code: int
-    body: Optional[Any] = None
-    headers: Optional[dict[str, str]] = None
-    content_type: Optional[str] = "application/json"
+    body: Any | None = None
+    headers: dict[str, str] | None = None
+    content_type: str | None = "application/json"
 
 
 class HttpResponseFactory: