diff --git a/submodules/msisac b/submodules/msisac
index 5f4300408..4ac637d32 160000
--- a/submodules/msisac
+++ b/submodules/msisac
@@ -1 +1 @@
-Subproject commit 5f43004087e34a6d00de8f20c6b3b9326483f194
+Subproject commit 4ac637d3256f87f92c94d61c1bc53acc0e8512cb