diff --git a/haystack/components/connectors/openapi_service.py b/haystack/components/connectors/openapi_service.py
index 7efe11cd75..9e93d6320f 100644
--- a/haystack/components/connectors/openapi_service.py
+++ b/haystack/components/connectors/openapi_service.py
@@ -44,7 +44,7 @@ def patch_request(
                              and exterpolating it.
         :param security: The security scheme to use, and the values it needs to
                          process successfully.
-        :param session: a persistent request session
+        :param session: A persistent request session.
         :param verify: Should we do an ssl verification on the request or not,
                        In case str was provided, will use that as the CA.
         :return: The response data, either raw or processed depending on raw_response flag