diff --git a/build.xml b/build.xml
index 7427788..c93f0d4 100644
--- a/build.xml
+++ b/build.xml
@@ -63,7 +63,8 @@
            destdir="${build.home}/classes"
              debug="${compile.debug}"
        deprecation="${compile.deprecation}"
-          optimize="${compile.optimize}">
+          optimize="${compile.optimize}"
+           target="1.4">
       <classpath refid="compile.classpath"/>
     </javac>
     <copy    todir="${build.home}/classes" filtering="on">
@@ -78,7 +79,8 @@
            destdir="${build.home}/tests"
              debug="${compile.debug}"
        deprecation="off"
-          optimize="${compile.optimize}">
+          optimize="${compile.optimize}"
+           target="1.4">
       <classpath refid="test.classpath"/>
     </javac>
     <copy    todir="${build.home}/tests" filtering="on">