diff --git a/lib/pkp b/lib/pkp
index c18e9b18cb3..8d7d4c7936d 160000
--- a/lib/pkp
+++ b/lib/pkp
@@ -1 +1 @@
-Subproject commit c18e9b18cb35b4b783286c61ff3e2ccc54dca007
+Subproject commit 8d7d4c7936dcfa1e3ed002f569a2ec4c149f4cae