diff --git a/limestone b/limestone
index 0abbb64..20a1999 160000
--- a/limestone
+++ b/limestone
@@ -1 +1 @@
-Subproject commit 0abbb64afefae3d3f4df0398f65ff94a1f60f543
+Subproject commit 20a19999d8c666159e59897273dfafd71943c245