diff --git a/lib/pkp b/lib/pkp
index 860edf8adb..ef97cafcc3 160000
--- a/lib/pkp
+++ b/lib/pkp
@@ -1 +1 @@
-Subproject commit 860edf8adb8e1430f9b51d0de2ecb6eb8c53dd01
+Subproject commit ef97cafcc3fbea10eb2a98fa18bdbc5e15ad8146