diff --git a/lib/pkp b/lib/pkp
index 34e7fe70ea..ffcb8c3dd4 160000
--- a/lib/pkp
+++ b/lib/pkp
@@ -1 +1 @@
-Subproject commit 34e7fe70eafd47dda983b02440ee66436ddf3586
+Subproject commit ffcb8c3dd4666ed7d229fc18988a8cbbac8c0e50