diff --git a/servant/protocol b/servant/protocol
index c1b0f612..9b3921b1 160000
--- a/servant/protocol
+++ b/servant/protocol
@@ -1 +1 @@
-Subproject commit c1b0f6122921ee01f6660cdd6f2e4ae7d57f879e
+Subproject commit 9b3921b1036a24ed175650160f793b9b94459ea8