diff --git a/Packages/Interval_arithmetic/version b/Packages/Interval_arithmetic/version
index bc874f7ab41..5c4baf0b139 100644
--- a/Packages/Interval_arithmetic/version
+++ b/Packages/Interval_arithmetic/version
@@ -1 +1 @@
-4.167 (22 May 2003)
+4.168 ( 8 Jul 2003)