diff --git a/lib/pkp b/lib/pkp
index eec13bb4b9..d6ad5d9ee0 160000
--- a/lib/pkp
+++ b/lib/pkp
@@ -1 +1 @@
-Subproject commit eec13bb4b9f694a42246fc343a34444bf52b5ddc
+Subproject commit d6ad5d9ee0437c00b253fc21f10c4bbb23fdd39b