diff --git a/c b/c
index 156633bc5..1bb6130cb 160000
--- a/c
+++ b/c
@@ -1 +1 @@
-Subproject commit 156633bc507426e67871b2c2e5107bbd0f3233c9
+Subproject commit 1bb6130cbbe3e41378a616588ce4afe4747308a6
diff --git a/service/src/iothub_service_client_python.cpp b/service/src/iothub_service_client_python.cpp
index e9a96357c..3f6a58a59 100644
--- a/service/src/iothub_service_client_python.cpp
+++ b/service/src/iothub_service_client_python.cpp
@@ -33,7 +33,7 @@
 #define IMPORT_NAME iothub_service_client
 #endif
 
-#define IOTHUB_PYTHON_SERVICE_SDK_VERSION "5"
+#define IOTHUB_PYTHON_SERVICE_SDK_VERSION "6"
 #define VERSION_STRING IOTHUB_SERVICE_CLIENT_VERSION "." IOTHUB_PYTHON_SERVICE_SDK_VERSION
 
 #if PY_MAJOR_VERSION >= 3