diff --git a/contracts/lib/openzeppelin-contracts b/contracts/lib/openzeppelin-contracts
index cab1993..40a51f7 160000
--- a/contracts/lib/openzeppelin-contracts
+++ b/contracts/lib/openzeppelin-contracts
@@ -1 +1 @@
-Subproject commit cab19933c33c2ad1d4c7a84864a3601dddfd16f3
+Subproject commit 40a51f7e78852e48d0b128d4ee3d620cbc7d35d8