diff --git a/js/rhino/build.xml b/js/rhino/build.xml
index 2cbd755d49c8..502806f3e9c1 100644
--- a/js/rhino/build.xml
+++ b/js/rhino/build.xml
@@ -9,7 +9,7 @@ Requires Ant version 1.2 or later
   <target name="properties">
     <property name="name" value="rhino"/>
     <property name="Name" value="Rhino"/>
-    <property name="version" value="1_5R4"/>
+    <property name="version" value="1_5R5pre"/>
     <property name="rhino.jar" value="js.jar"/>
   
     <property name="debug" value="on"/>