diff --git a/lib/pkp b/lib/pkp
index a158778b042..1994e9d8c6f 160000
--- a/lib/pkp
+++ b/lib/pkp
@@ -1 +1 @@
-Subproject commit a158778b0420dfb405866b51f6200bf41b4eb1a9
+Subproject commit 1994e9d8c6fc8aec0e31765adc6b34a4c2a2123d