diff --git a/lib/pkp b/lib/pkp
index e4761a870f0..8f8d5c8d820 160000
--- a/lib/pkp
+++ b/lib/pkp
@@ -1 +1 @@
-Subproject commit e4761a870f0645b5f68e85e72e649ea76672b06f
+Subproject commit 8f8d5c8d8208b035c15d3a78cc2f02d4dfb72533