diff --git a/src/openjd/adaptor_runtime/_entrypoint.py b/src/openjd/adaptor_runtime/_entrypoint.py
index 8127390..1bf9986 100644
--- a/src/openjd/adaptor_runtime/_entrypoint.py
+++ b/src/openjd/adaptor_runtime/_entrypoint.py
@@ -250,7 +250,7 @@ def _get_integration_data(self, parsed_args: Namespace) -> _IntegrationData:
     def start(
         self,
         reentry_exe: Optional[Path] = None,
-        timeout_in_seconds: Optional[float] = _FRONTEND_RUNNER_REQUEST_TIMEOUT,
+        timeout_in_seconds: float = _FRONTEND_RUNNER_REQUEST_TIMEOUT,
     ) -> None:
         """
         Starts the run of the adaptor.