diff --git a/changelog.d/20251219_112556_kurtmckee_tunnel_type_annotations.rst b/changelog.d/20251219_112556_kurtmckee_tunnel_type_annotations.rst
new file mode 100644
index 000000000..b706d97ce
--- /dev/null
+++ b/changelog.d/20251219_112556_kurtmckee_tunnel_type_annotations.rst
@@ -0,0 +1,4 @@
+Development
+-----------
+
+- Update the Streams-related type annotations to accept UUIDs. (:pr:`NUMBER`)
diff --git a/src/globus_sdk/services/transfer/client.py b/src/globus_sdk/services/transfer/client.py
index 1de209b78..92194678d 100644
--- a/src/globus_sdk/services/transfer/client.py
+++ b/src/globus_sdk/services/transfer/client.py
@@ -2746,7 +2746,7 @@ def create_tunnel(
 
     def update_tunnel(
         self,
-        tunnel_id: str,
+        tunnel_id: str | uuid.UUID,
         update_doc: dict[str, t.Any],
     ) -> response.GlobusHTTPResponse:
         r"""
@@ -2778,7 +2778,7 @@ def update_tunnel(
 
     def get_tunnel(
         self,
-        tunnel_id: str,
+        tunnel_id: str | uuid.UUID,
         *,
         query_params: dict[str, t.Any] | None = None,
     ) -> response.GlobusHTTPResponse:
@@ -2807,7 +2807,7 @@ def get_tunnel(
 
     def delete_tunnel(
         self,
-        tunnel_id: str,
+        tunnel_id: str | uuid.UUID,
     ) -> response.GlobusHTTPResponse:
         """
         :param tunnel_id: The ID of the Tunnel to be deleted.
@@ -2862,7 +2862,7 @@ def list_tunnels(
 
     def get_stream_access_point(
         self,
-        stream_ap_id: str,
+        stream_ap_id: str | uuid.UUID,
         *,
         query_params: dict[str, t.Any] | None = None,
     ) -> response.GlobusHTTPResponse: