diff --git a/Packages/Interval_arithmetic/version b/Packages/Interval_arithmetic/version
index 0685e390fe9..9e539b65521 100644
--- a/Packages/Interval_arithmetic/version
+++ b/Packages/Interval_arithmetic/version
@@ -1 +1 @@
-4.125 (19 Dec 2001)
+4.126 ( 7 Jan 2002)