diff --git a/lib/pkp b/lib/pkp
index ccbbc264f0c..b9c38f653ab 160000
--- a/lib/pkp
+++ b/lib/pkp
@@ -1 +1 @@
-Subproject commit ccbbc264f0cc43448cd6a0d818de29cd23ae39ec
+Subproject commit b9c38f653ab8c66b762158f98d0c3bddf5df2be4