diff --git a/lib/pkp b/lib/pkp
index 9f03824f2a..87a70d56b6 160000
--- a/lib/pkp
+++ b/lib/pkp
@@ -1 +1 @@
-Subproject commit 9f03824f2a73eaf38fd480396573411b2f45b9f8
+Subproject commit 87a70d56b636172e3bdf2928960ec8534957b45c