diff --git a/src/gmmpp_msgs.erl b/src/gmmpp_msgs.erl
index 240cc3a..d2dfe20 100644
--- a/src/gmmpp_msgs.erl
+++ b/src/gmmpp_msgs.erl
@@ -36,7 +36,7 @@
 
 -define(VSN0, <<"0.1">>).
 -define(VSN, ?VSN0).
--define(PROTOCOL_JSON, <<"pool_ws_json">>).
+-define(PROTOCOL_JSON, <<"json">>).
 -define(PROTOCOL, ?PROTOCOL_JSON).
 
 -spec latest_version() -> version().