diff --git a/SparseDiffEngine b/SparseDiffEngine
index 7e7678e..4172c5e 160000
--- a/SparseDiffEngine
+++ b/SparseDiffEngine
@@ -1 +1 @@
-Subproject commit 7e7678e7f7e65b3e2391a002cdf22048af69bd43
+Subproject commit 4172c5ece836bc8d8ebd3fa59b89e019874ea681