diff --git a/lib/pkp b/lib/pkp
index 3143b87effc..afb1bdfdd56 160000
--- a/lib/pkp
+++ b/lib/pkp
@@ -1 +1 @@
-Subproject commit 3143b87effcc3ed2814b38a3b99b7310e0ec850d
+Subproject commit afb1bdfdd56c4c9ad48332afd736ec1e5cf7e938