1 files changed, 2 insertions, 0 deletions
diff --git a/docker/complement/conf/workers-shared-extra.yaml.j2 b/docker/complement/conf/workers-shared-extra.yaml.j2
index 2b11b487f6..32eada4419 100644
--- a/docker/complement/conf/workers-shared-extra.yaml.j2
+++ b/docker/complement/conf/workers-shared-extra.yaml.j2
@@ -102,6 +102,8 @@ experimental_features:
   msc3391_enabled: true
   # Filtering /messages by relation type.
   msc3874_enabled: true
+  # no UIA for x-signing upload for the first time
+  msc3967_enabled: true
 
 server_notices:
   system_mxid_localpart: _server