diff --git a/lib/pkp b/lib/pkp
index 1d6663be9c..f4791af327 160000
--- a/lib/pkp
+++ b/lib/pkp
@@ -1 +1 @@
-Subproject commit 1d6663be9ca3f83ce27cd2078629fc1c3b30e003
+Subproject commit f4791af3279dc5f96f74d8e146c0d0453a262dff