diff --git a/Makefile b/Makefile
index f0615ac..23fbf2f 100644
--- a/Makefile
+++ b/Makefile
@@ -7,6 +7,7 @@ SPHINXBUILD   = sphinx-build
 SOURCEDIR     = .
 BUILDDIR      = _build
 MODULES       = $(sort \
+    socket_protocol\
     state_machine\
     stringtools\
     stringtools.csp\
diff --git a/socket_protocol b/socket_protocol
index eff44b7..35d9f68 160000
--- a/socket_protocol
+++ b/socket_protocol
@@ -1 +1 @@
-Subproject commit eff44b7988cbdaf87865010b5b8919dc0d6f31db
+Subproject commit 35d9f688a4f080a8cae70a18e27036b55399edde