diff --git a/doc/design/p2p_protocol_over_http.mdwn b/doc/design/p2p_protocol_over_http.mdwn
index 90d68fa371..ec20de471e 100644
--- a/doc/design/p2p_protocol_over_http.mdwn
+++ b/doc/design/p2p_protocol_over_http.mdwn
@@ -1,4 +1,4 @@
-[[!toc ]]
+[[!toc levels=2]]
 
 ## introduction