diff --git a/lib/pkp b/lib/pkp
index ffea90b4800..78871ca3c89 160000
--- a/lib/pkp
+++ b/lib/pkp
@@ -1 +1 @@
-Subproject commit ffea90b4800dbd708f904e9420820f3743242e4a
+Subproject commit 78871ca3c891ccbd08a2c4da2159f97992f4b608