diff --git a/traefik.yml b/traefik.yml
index dfd603a..010f080 100644
--- a/traefik.yml
+++ b/traefik.yml
@@ -74,6 +74,8 @@
               ports:
                 - 80:80
                 - 443:443
+                # matrix federation over Port 8448
+                - 8448:443
               volumes:
                 - /etc/localtime:/etc/localtime:ro
                 - /var/run/docker.sock:/var/run/docker.sock:ro