diff --git a/keystone b/keystone
index 9a9022600e..3ec9940710 160000
--- a/keystone
+++ b/keystone
@@ -1 +1 @@
-Subproject commit 9a9022600e01ea09131cf194ffa5c1757ffeb24f
+Subproject commit 3ec99407109fdff8c10b1bb6609c01a6fc5a6ad1