diff --git a/ansible/plays/services/matrix/docker-compose.yaml b/ansible/plays/services/matrix/docker-compose.yaml
index 1836856..5424bc5 100644
--- a/ansible/plays/services/matrix/docker-compose.yaml
+++ b/ansible/plays/services/matrix/docker-compose.yaml
@@ -182,6 +182,8 @@ services:
 {{ pg.postgres("db-bridge-signal", matrix.bridge.signal.dbuser, matrix.bridge.signal.dbpass, matrix.bridge.signal.dbname, ["backend"] ) }}
 
 networks:
+  default:
+    enable_ipv6: true
   postgres:
     internal: true
   backend:
diff --git a/ansible/plays/services/matrix/mautrix-slack/config.yaml b/ansible/plays/services/matrix/mautrix-slack/config.yaml
index 10c508b..1a1b3dd 100644
--- a/ansible/plays/services/matrix/mautrix-slack/config.yaml
+++ b/ansible/plays/services/matrix/mautrix-slack/config.yaml
@@ -86,6 +86,8 @@ bridge:
     # Note that updating the m.direct event is not atomic (except with mautrix-asmux)
     # and is therefore prone to race conditions.
     sync_direct_chat_list: false
+    private_chat_portal_meta: always
+    federate_rooms: false
     # Servers to always allow double puppeting from
     double_puppet_server_map:
       {{ matrix.baseurl }}: https://{{ matrix.baseurl }}
@@ -123,7 +125,7 @@ bridge:
         additional_help: ""
     backfill:
         # Allow backfilling at all? Requires MSC2716 support on homeserver.
-        enable: true
+        enable: false
         # If a backfilled chat is older than this number of hours, mark it as read even if it's unread on Slack.
         # Set to -1 to let any chat be unread.
         unread_hours_threshold: 720