diff --git a/cxgn/sgn b/cxgn/sgn
index 51b6389..8518f7a 160000
--- a/cxgn/sgn
+++ b/cxgn/sgn
@@ -1 +1 @@
-Subproject commit 51b6389a9cb431e905ab28b538d5d45546dea951
+Subproject commit 8518f7a2fcf3a36676d76e55810447bf9a0227a0