diff --git a/lib/pkp b/lib/pkp
index e9103831a9..e853ef203b 160000
--- a/lib/pkp
+++ b/lib/pkp
@@ -1 +1 @@
-Subproject commit e9103831a9aa4b94d8e2ad4721cebfd35fbf8aff
+Subproject commit e853ef203b907094bf193a6f43462a2537b32ee9