diff --git a/lib/rt64 b/lib/rt64
index 646bb81..6de3939 160000
--- a/lib/rt64
+++ b/lib/rt64
@@ -1 +1 @@
-Subproject commit 646bb813a54dbef5bec8d38f5a08fd1acde1d555
+Subproject commit 6de3939913f788524e3bd820b34014955f779118