diff --git a/lib/ntk b/lib/ntk
index 664ca2a..f4ea6b8 160000
--- a/lib/ntk
+++ b/lib/ntk
@@ -1 +1 @@
-Subproject commit 664ca2afab82d85ad4e975c7dea1c29ff5d30e7e
+Subproject commit f4ea6b8e475ef7cc252a5d0183f3c5e3b06188e3