diff --git a/lib/ntk b/lib/ntk
index 977a180..81f41f5 160000
--- a/lib/ntk
+++ b/lib/ntk
@@ -1 +1 @@
-Subproject commit 977a180175b776f700e799112ac138281b29a7a4
+Subproject commit 81f41f5fed153f7f9aa5f7b845d7171f74919750