diff --git a/protocol b/protocol
index ad5de6d..55b1e3e 160000
--- a/protocol
+++ b/protocol
@@ -1 +1 @@
-Subproject commit ad5de6d9f824d578c67dd81bc44dfb2d0483ff44
+Subproject commit 55b1e3e41fc44a9e28b33a759371e180aa53c172