diff --git a/shard_core/service/traefik_dynamic_config.py b/shard_core/service/traefik_dynamic_config.py
index bab844e..bf957f6 100644
--- a/shard_core/service/traefik_dynamic_config.py
+++ b/shard_core/service/traefik_dynamic_config.py
@@ -70,7 +70,7 @@ def _add_http_section(model: t.Model, portal: SafeIdentity):
             tls=make_http_cert_resolver(portal),
         ),
         "traefik": t.HttpRouter(
-            rule=f"HostRegexp(`traefik.{portal.domain}`)",
+            rule=f"Host(`traefik.{portal.domain}`)",
             entryPoints=[http_entrypoint],
             service="api@internal",
             middlewares=["auth-private"],