Index: library/serialize/serializer.tcl
===================================================================
diff -u -N -r8cbd921f522b6950968c5c2cb36b2fb3463a4dbb -r52a6105ea8b966cf8cc33d2201f8d7fa8c05dbc3
--- library/serialize/serializer.tcl	(.../serializer.tcl)	(revision 8cbd921f522b6950968c5c2cb36b2fb3463a4dbb)
+++ library/serialize/serializer.tcl	(.../serializer.tcl)	(revision 52a6105ea8b966cf8cc33d2201f8d7fa8c05dbc3)
@@ -1,6 +1,6 @@
 package require nx
 
-package require XOTcl 2.0
+package require XOTcl 2.1
 package provide nx::serializer 2.1
 
 # For the time being, we require classical XOTcl.