diff --git a/Packages/Interval_arithmetic/version b/Packages/Interval_arithmetic/version
index b49cec29dde..f89ea1d8faa 100644
--- a/Packages/Interval_arithmetic/version
+++ b/Packages/Interval_arithmetic/version
@@ -1 +1 @@
-4.89 (23 May 2001)
+4.90 (23 May 2001)