diff --git a/lib/pkp b/lib/pkp
index d2ed0ef56e..23e3b5ecd6 160000
--- a/lib/pkp
+++ b/lib/pkp
@@ -1 +1 @@
-Subproject commit d2ed0ef56e6268bcc02f9ca6cba0d2ae90402b48
+Subproject commit 23e3b5ecd689bd3eff6a2ce708ca6c96ff1d6539