diff --git a/lib/pkp b/lib/pkp
index b5f0cf701c9..1f97a168c71 160000
--- a/lib/pkp
+++ b/lib/pkp
@@ -1 +1 @@
-Subproject commit b5f0cf701c90892c1b89169d07195fd1bee11b51
+Subproject commit 1f97a168c71a4f7c0c5393bea32f979fb3d910ab