diff --git a/lib/rt64 b/lib/rt64
index 30ce08d..52ff7f5 160000
--- a/lib/rt64
+++ b/lib/rt64
@@ -1 +1 @@
-Subproject commit 30ce08d33c3ace2dc2eeb73296e7249a05a877ff
+Subproject commit 52ff7f518809f1b5197516cc223e87cb4d4a870f