diff --git a/lib/pkp b/lib/pkp
index 9bac544bf8..5df99544b7 160000
--- a/lib/pkp
+++ b/lib/pkp
@@ -1 +1 @@
-Subproject commit 9bac544bf858c39150bdb430f66767205e905062
+Subproject commit 5df99544b79ba1f4b97ceb270ed279ab06fb7883