--- apache-ivy-2.3.0/build.properties	2012-04-02 23:11:30.000000000 +0200
+++ apache-ivy-2.3.0/build.properties	2017-09-07 14:13:28.647597540 +0200
@@ -42,7 +42,7 @@
 checkstyle.src.dir=${basedir}/src/etc/checkstyle
 rat.report.dir=${reports.dir}/rat
 
-ivy.minimum.javaversion=1.4
+ivy.minimum.javaversion=1.8
 debug.mode=on
 ivy.install.version=1.4.1
 
--- apache-ivy-2.3.0/build.xml	2012-04-09 08:58:36.000000000 +0200
+++ apache-ivy-2.3.0/build.xml	2017-09-07 14:46:13.128164218 +0200
@@ -517,7 +517,7 @@
 	</target>
 
     <target name="javadoc" unless="skip.javadoc">
-        <javadoc destdir="${javadoc.build.dir}" useexternalfile="true">
+        <javadoc destdir="${javadoc.build.dir}" useexternalfile="false" source="${ivy.minimum.javaversion}">
             <fileset dir="${src.dir}" includes="**/*.java" />
         </javadoc>
     </target>