diff --git a/lib/pkp b/lib/pkp
index d24432eb64..e646ac8966 160000
--- a/lib/pkp
+++ b/lib/pkp
@@ -1 +1 @@
-Subproject commit d24432eb64da466b565677eb724a36e2e7fead0b
+Subproject commit e646ac8966854f178465b343d01c130d99556c9e