diff --git a/contracts b/contracts
index 591fda91..31188f58 160000
--- a/contracts
+++ b/contracts
@@ -1 +1 @@
-Subproject commit 591fda9174610519f89842e651f3186eac8862eb
+Subproject commit 31188f585dc7d7f9e58c138e4c3257e9c2c274c0