diff --git a/lib/pkp b/lib/pkp
index 63b00c7cc8..b191acdc62 160000
--- a/lib/pkp
+++ b/lib/pkp
@@ -1 +1 @@
-Subproject commit 63b00c7cc87f3788efba7e5386b9c6929e1a0807
+Subproject commit b191acdc62e0fbaa84447bc239cb9ef17c6381f1