diff --git a/lib/pkp b/lib/pkp
index edc044dfe5c..63f18cfbeee 160000
--- a/lib/pkp
+++ b/lib/pkp
@@ -1 +1 @@
-Subproject commit edc044dfe5c352fa39f55dead98651bdc83f0833
+Subproject commit 63f18cfbeee5403d10002806f89b97876b483cc9