diff --git a/lib/pkp b/lib/pkp
index 0d8b72e2f39..420c4984031 160000
--- a/lib/pkp
+++ b/lib/pkp
@@ -1 +1 @@
-Subproject commit 0d8b72e2f39a1304e6b8528db7fad0cd49e52d80
+Subproject commit 420c498403123bdc83f38c3911ce0e14681b84df