diff --git a/lib/pkp b/lib/pkp
index 87ad3ae9e3..5bba13a0c6 160000
--- a/lib/pkp
+++ b/lib/pkp
@@ -1 +1 @@
-Subproject commit 87ad3ae9e3a033c9b5c952ba3ea8bdd0047b9092
+Subproject commit 5bba13a0c60efa569e1ab6fb95e15998015a0a8c