diff --git a/lib/pkp b/lib/pkp
index 9f0b96e66e9..8599afe69da 160000
--- a/lib/pkp
+++ b/lib/pkp
@@ -1 +1 @@
-Subproject commit 9f0b96e66e90b12d9add55182b58970e44859d39
+Subproject commit 8599afe69da400649f70be751fa3689161f2e14c