diff --git a/Packages/Interval_arithmetic/version b/Packages/Interval_arithmetic/version
index 8b37266789b..8abe37e428b 100644
--- a/Packages/Interval_arithmetic/version
+++ b/Packages/Interval_arithmetic/version
@@ -1 +1 @@
-4.164 (11 May 2003)
+4.165 (11 May 2003)