diff --git a/lib/pkp b/lib/pkp
index f817a7ca602..85e4c68479f 160000
--- a/lib/pkp
+++ b/lib/pkp
@@ -1 +1 @@
-Subproject commit f817a7ca6027472241d8ed438f0ea0281b850915
+Subproject commit 85e4c68479f4065e189330d8ae12f6b07c197b42