--- build.xml.orig	2016-06-20 14:54:06 UTC
+++ build.xml
@@ -32,7 +32,7 @@
 	</target>
 	
 	<target name="compile" depends="prepare">
-		<javac destdir="${build}/classes" classpathref="classpath.libs" debug="on">
+		<javac destdir="${build}/classes" source="1.5" target="1.5" classpathref="classpath.libs" debug="on">
 		    <src path="${src}"/>
 		</javac>
 	</target>