--- a/build/release.xml

+++ a/build/release.xml

@@ -35,7 +35,7 @@

 	</target>

 	<target name="compile" depends="prep" description="Compiles ascii2image code">

-		<javac destdir="${rootDir}/jar-temp" source="1.6" classpathref="build.classpath">

+		<javac destdir="${rootDir}/jar-temp" source="8" classpathref="build.classpath">

 			<src path="${rootDir}/src" />

 			<exclude name="org/stathissideris/ascii2image/test/**" />

 		</javac>