diff --git a/lib/pkp b/lib/pkp
index 67c74d9af2..770b9a9fab 160000
--- a/lib/pkp
+++ b/lib/pkp
@@ -1 +1 @@
-Subproject commit 67c74d9af2de0a84a2306a7405b81ba9a2889b86
+Subproject commit 770b9a9fab0e968d92ad4161024e7ac45e20a053