diff --git a/lib/pkp b/lib/pkp
index 976368bfafc..1d6bc2517c9 160000
--- a/lib/pkp
+++ b/lib/pkp
@@ -1 +1 @@
-Subproject commit 976368bfafc964b7980b3f194ff1c3d7ca74d3b2
+Subproject commit 1d6bc2517c99d87d23ba0b2aa153b40c2aac3058