diff --git a/lib/pkp b/lib/pkp
index 35ed0cbbce8..4c2b857781a 160000
--- a/lib/pkp
+++ b/lib/pkp
@@ -1 +1 @@
-Subproject commit 35ed0cbbce8dace810fa6e95ff0f90ec3df3f1f3
+Subproject commit 4c2b857781aaafa3ca5e76df66e9195ef814331a