diff --git a/contracts/lib/tnt-core b/contracts/lib/tnt-core
index c1fa9c7..b51a732 160000
--- a/contracts/lib/tnt-core
+++ b/contracts/lib/tnt-core
@@ -1 +1 @@
-Subproject commit c1fa9c7c3c5891aab9bd25002a434d93c54942cd
+Subproject commit b51a732e80e9f8fb9245b4e58968f2bd54a37b66