1 files changed, 3 insertions, 0 deletions

diff --git a/docs/usage/configuration/config_documentation.md b/docs/usage/configuration/config_documentation.md

index a673975e04..4200e70c83 100644
--- a/docs/usage/configuration/config_documentation.md
+++ b/docs/usage/configuration/config_documentation.md
@@ -4219,6 +4219,9 @@ outbound_federation_restricted_to:
 Also see the [worker
 documentation](../../workers.md#restrict-outbound-federation-traffic-to-a-specific-set-of-workers)
 for more info.
+
+_Added in Synapse 1.89.0._
+
 ---
 ### `run_background_tasks_on`