diff --git a/lib/pkp b/lib/pkp
index a92a27ff2e8..1f6591ce7bb 160000
--- a/lib/pkp
+++ b/lib/pkp
@@ -1 +1 @@
-Subproject commit a92a27ff2e8acd2bb2e007054cbc710b78aef338
+Subproject commit 1f6591ce7bbdc6ee66a0807737fcae448abd55b6