diff --git a/lib/pkp b/lib/pkp
index eec13bb4b9..a964f5c282 160000
--- a/lib/pkp
+++ b/lib/pkp
@@ -1 +1 @@
-Subproject commit eec13bb4b9f694a42246fc343a34444bf52b5ddc
+Subproject commit a964f5c28205409ce85469f5eb7cb0be1a7615c0