diff --git a/jack b/jack
index 1bfa5e4..742c63e 160000
--- a/jack
+++ b/jack
@@ -1 +1 @@
-Subproject commit 1bfa5e43cef62c2fa20e1a1b27162a1ce77c9597
+Subproject commit 742c63e0243156e53485e19dbab800d0da79f7b1