diff --git a/lib/pkp b/lib/pkp
index 9e75633e480..af501d2e3d0 160000
--- a/lib/pkp
+++ b/lib/pkp
@@ -1 +1 @@
-Subproject commit 9e75633e4809dc79ce26b8e8a3287073478020bb
+Subproject commit af501d2e3d0bcec2b0b57986349bc1280f21b6dc