diff --git a/lib/pkp b/lib/pkp
index 08864e5bcd..f31c826ea9 160000
--- a/lib/pkp
+++ b/lib/pkp
@@ -1 +1 @@
-Subproject commit 08864e5bcdf158d3f18024089325f3b2abe37d6a
+Subproject commit f31c826ea97c8778f8cbee846b81a64abe819382