diff --git a/vendor/fastsum b/vendor/fastsum
index 4a8f13592..dbeff0af5 160000
--- a/vendor/fastsum
+++ b/vendor/fastsum
@@ -1 +1 @@
-Subproject commit 4a8f1359233bbb2bea7a0eee478c28d0184ebe6d
+Subproject commit dbeff0af57fcea85bca07ff5a8149301dd3b084c