diff --git a/lib/pkp b/lib/pkp
index f29ce267fb..19cb55ad2e 160000
--- a/lib/pkp
+++ b/lib/pkp
@@ -1 +1 @@
-Subproject commit f29ce267fbacc8d9285f0454079a50fabf44b235
+Subproject commit 19cb55ad2e1f63aa9d15c31bff2459199c113cd0