diff --git a/lib/pkp b/lib/pkp
index 88324c28ec6..e4be1cd1b41 160000
--- a/lib/pkp
+++ b/lib/pkp
@@ -1 +1 @@
-Subproject commit 88324c28ec60ce26a615a6f5a9c7f12203aa2efc
+Subproject commit e4be1cd1b41926b0bf842a0f9353e6dcfb7ac18e