diff --git a/mozilla/js/rhino/build.properties b/mozilla/js/rhino/build.properties
index 8f5149e3cca..39798a0d363 100644
--- a/mozilla/js/rhino/build.properties
+++ b/mozilla/js/rhino/build.properties
@@ -52,8 +52,8 @@ classes: ${build.dir}/classes
 
 # compilation settings
 debug: on
-target-jvm: 1.3
-source-level: 1.3
+target-jvm: 1.4
+source-level: 1.4
 
 # jar generation settings 
 jar-compression: true