diff --git a/build.xml b/build.xml
index 1d31b31..c52dd43 100644
--- a/build.xml
+++ b/build.xml
@@ -80,7 +80,7 @@
     <javac srcdir="${src.dir}" destdir="${deploy.dir}/classes"
            debug="on" optimize="off" deprecation="on"
            classpathref="clazzpath" includeAntRuntime="no"
-           source="1.6" target="1.5">
+           source="1.5" target="1.5">
       <exclude name="**/TorrentDownloader*" unless="build.torrent"/>
       <exclude name="**/tools/Differ*" unless="build.differ"/>
       <compilerarg value="-Xlint:unchecked"/>