diff --git a/bumble/gatt_server.py b/bumble/gatt_server.py
index 29e4c28b..02f52a78 100644
--- a/bumble/gatt_server.py
+++ b/bumble/gatt_server.py
@@ -777,6 +777,18 @@ async def on_att_read_by_type_request(
             error_code=att.ATT_ATTRIBUTE_NOT_FOUND_ERROR,
         )
 
+        if (
+            request.starting_handle == 0x0000
+            or request.starting_handle > request.ending_handle
+        ):
+            response = att.ATT_Error_Response(
+                request_opcode_in_error=request.op_code,
+                attribute_handle_in_error=request.starting_handle,
+                error_code=att.ATT_INVALID_HANDLE_ERROR,
+            )
+            self.send_response(bearer, response)
+            return
+
         attributes: list[tuple[int, bytes]] = []
         for attribute in (
             attribute