diff --git a/Packages/Interval_arithmetic/version b/Packages/Interval_arithmetic/version
index e95f128d111..36f4a00e96b 100644
--- a/Packages/Interval_arithmetic/version
+++ b/Packages/Interval_arithmetic/version
@@ -1 +1 @@
-4.186 (27 Nov 2003)
+4.187 (18 Dec 2003)