diff --git a/lib/pkp b/lib/pkp
index b2119995568..c8a22ad667b 160000
--- a/lib/pkp
+++ b/lib/pkp
@@ -1 +1 @@
-Subproject commit b2119995568fb283790c7a3ffe2423985f2e3f34
+Subproject commit c8a22ad667b665e5cccb5fd1ebe72dfc179f9951