diff --git a/Misc/ACKS b/Misc/ACKS
index c95e76d..fe80c8b 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -413,6 +413,7 @@
 Tamito Kajiyama
 Peter van Kampen
 Jacob Kaplan-Moss
+Piotr Kasprzyk
 Lou Kates
 Hiroaki Kawai
 Sebastien Keim