diff --git a/lib/pkp b/lib/pkp
index d4cbeaf707..437aff5056 160000
--- a/lib/pkp
+++ b/lib/pkp
@@ -1 +1 @@
-Subproject commit d4cbeaf7072c205d26ee3fdc8032730b77b0310b
+Subproject commit 437aff50561641e614d75863c57e60c976425000