diff --git a/lib/pkp b/lib/pkp
index e543199b21..d4cbeaf707 160000
--- a/lib/pkp
+++ b/lib/pkp
@@ -1 +1 @@
-Subproject commit e543199b212ecca817689f76cdddf03f2457a852
+Subproject commit d4cbeaf7072c205d26ee3fdc8032730b77b0310b