diff --git a/lib/pkp b/lib/pkp
index b065e8c674..1f6591ce7b 160000
--- a/lib/pkp
+++ b/lib/pkp
@@ -1 +1 @@
-Subproject commit b065e8c6745c123e32b38cda163011a81015ce0a
+Subproject commit 1f6591ce7bbdc6ee66a0807737fcae448abd55b6