diff --git a/lib/pkp b/lib/pkp
index bf243e1e25..81587bfefc 160000
--- a/lib/pkp
+++ b/lib/pkp
@@ -1 +1 @@
-Subproject commit bf243e1e25e25523434916e1c54c172f6169c702
+Subproject commit 81587bfefc61a400c84eacadd27382349c6184a3