diff --git a/src/mqtt/mqttv4 b/src/mqtt/mqttv4
index e8fe4b2..dcf8161 160000
--- a/src/mqtt/mqttv4
+++ b/src/mqtt/mqttv4
@@ -1 +1 @@
-Subproject commit e8fe4b2f4f5b6517a6ca1b5434f9fc8a00bc5d08
+Subproject commit dcf81616cc31a82ee8bdf54061d11d50806d94f5