diff --git a/bumble/device.py b/bumble/device.py
index 72fd7550..258a43d6 100644
--- a/bumble/device.py
+++ b/bumble/device.py
@@ -889,7 +889,7 @@ def host_event_handler(function):
 # List of host event handlers for the Device class.
 # (we define this list outside the class, because referencing a class in method
 #  decorators is not straightforward)
-device_host_event_handlers: list[str] = []
+device_host_event_handlers: List[str] = []
 
 
 # -----------------------------------------------------------------------------
diff --git a/bumble/gatt.py b/bumble/gatt.py
index e57f0a60..9721fd4c 100644
--- a/bumble/gatt.py
+++ b/bumble/gatt.py
@@ -206,7 +206,7 @@ class Service(Attribute):
 
     uuid: UUID
 
-    def __init__(self, uuid, characteristics: list[Characteristic], primary=True):
+    def __init__(self, uuid, characteristics: List[Characteristic], primary=True):
         # Convert the uuid to a UUID object if it isn't already
         if isinstance(uuid, str):
             uuid = UUID(uuid)