diff --git a/lib/pkp b/lib/pkp
index 9efe68add3..ac619e2931 160000
--- a/lib/pkp
+++ b/lib/pkp
@@ -1 +1 @@
-Subproject commit 9efe68add31ebd6b781857edf8bacb36388ba974
+Subproject commit ac619e2931710ed1412fa4349bff587c1858ae5b