diff --git a/lib/pkp b/lib/pkp
index 2622ef626de..17b51e3afae 160000
--- a/lib/pkp
+++ b/lib/pkp
@@ -1 +1 @@
-Subproject commit 2622ef626de8d4802ffae4228457f2393afedb1d
+Subproject commit 17b51e3afaeb954d38d3d36aa2db5a71f9e37dca