diff --git a/lib/pkp b/lib/pkp
index f09741c6237..a56d3aa8bc9 160000
--- a/lib/pkp
+++ b/lib/pkp
@@ -1 +1 @@
-Subproject commit f09741c62371de7721fad92321180ecd879749ab
+Subproject commit a56d3aa8bc98150b443ccd8b30d050b442967f20