Update THANKS.
diff --git a/THANKS b/THANKS
index 7ad9dc7..1c5bccd 100644
--- a/THANKS
+++ b/THANKS
@@ -40,6 +40,7 @@
   - Richard Koch
   - Ville Koskinen
   - Jan Kratochvil
+  - Christian Kujau
   - Stephan Kulow
   - Peter Lawler
   - Hin-Tak Leung