diff --git a/libraries/bytestring b/libraries/bytestring
index a44600feac0d6461964f10f505f8318a4b6aa71c..acfe93480a15ecd373a5de5e423b1460749e52e1 160000
--- a/libraries/bytestring
+++ b/libraries/bytestring
@@ -1 +1 @@
-Subproject commit a44600feac0d6461964f10f505f8318a4b6aa71c
+Subproject commit acfe93480a15ecd373a5de5e423b1460749e52e1