diff --git a/lib/pkp b/lib/pkp
index a1caad182d..f987128739 160000
--- a/lib/pkp
+++ b/lib/pkp
@@ -1 +1 @@
-Subproject commit a1caad182db02667ecebe229fb888c8d23423743
+Subproject commit f987128739d30b92df5b78f38bd50d2ddb18fe3d