diff --git a/build.xml b/build.xml
index b2b72a66e681d61d35fe4965f60c9956fbbd5905..8b5cfc973f67ef5908dc3433b369507a4824f22b 100644
--- a/build.xml
+++ b/build.xml
@@ -16,7 +16,7 @@
 
     <target depends="init" name="build" description="Builds the drivers" >
         <mkdir dir="${classes}"/>
-        <javac destdir="${classes}" includes="com/octetstring/**" srcdir="${src}">
+        <javac source="8" destdir="${classes}" includes="com/octetstring/**" srcdir="${src}">
             <classpath>
                 <pathelement location="${lib}/junit.jar" />
             </classpath>