diff --git a/lib/CPP_PTB b/lib/CPP_PTB
index ed00ab9..b5dcdff 160000
--- a/lib/CPP_PTB
+++ b/lib/CPP_PTB
@@ -1 +1 @@
-Subproject commit ed00ab9af261cde18854ddd5a03d889e7ad4f2d1
+Subproject commit b5dcdff754cfc77706f36f9f6416be09ef43f463