diff --git a/bincio/serve/server.py b/bincio/serve/server.py
index e4d190e..94e7525 100644
--- a/bincio/serve/server.py
+++ b/bincio/serve/server.py
@@ -380,6 +380,9 @@ async def register(request: Request) -> JSONResponse:
     from bincio.render.cli import _write_root_manifest
     _write_root_manifest(dd)
 
+    # Rebuild site so the new user's profile pages exist immediately
+    _trigger_rebuild(handle)
+
     token = create_session(_get_db(), handle)
     resp = JSONResponse({"ok": True, "handle": handle})
     _set_session_cookie(resp, token)