diff --git a/jsch-build.xml b/jsch-build.xml
index f739638..33aa4f7 100644
--- a/jsch-build.xml
+++ b/jsch-build.xml
@@ -10,11 +10,12 @@
 
   <property name="project.artifactId" value="jsch"/>
   <property name="project.version" value="0.2.9"/>
-  
+
   <property name="spec.version" value="0.2"/>
   <property name="versionWithoutMinus" value="${project.version}"/>
 
-  <property name="compiler.source" value="8"/>
+  <property name="compiler.release" value="8"/>
+  <property name="compiler.source" value="1.${compiler.release}"/>
   <property name="compiler.target" value="${compiler.source}"/>
 
   <property name="build.finalName" value="jsch-${project.version}"/>
@@ -72,13 +73,13 @@
       </filterchain>
     </copy>
     <mkdir dir="${build.outputDir}"/>
-    <javac destdir="${build.outputDir}" 
-           nowarn="true" 
-           debug="true" 
-           optimize="false" 
-           deprecation="true" 
-           release="${compiler.source}" 
-           verbose="false" 
+    <javac destdir="${build.outputDir}"
+           nowarn="true"
+           debug="true"
+           optimize="false"
+           deprecation="true"
+           release="${compiler.release}"
+           verbose="false"
            fork="false">
       <src>
         <pathelement location="${build.srcDir}"/>
@@ -89,14 +90,14 @@
     <mkdir dir="${build.mrOutputDir}"/>
     <!-- Override classes for Java 9+ -->
     <mkdir dir="${build.mrOutputDir.9}"/>
-    <javac destdir="${build.mrOutputDir.9}" 
-           nowarn="true" 
-           debug="true" 
-           optimize="false" 
-           deprecation="true" 
+    <javac destdir="${build.mrOutputDir.9}"
+           nowarn="true"
+           debug="true"
+           optimize="false"
+           deprecation="true"
            source="${compiler.source}"
            target="${compiler.target}"
-           verbose="false" 
+           verbose="false"
            fork="false">
       <src>
         <pathelement location="${build.mrSrcDir.9}"/>
@@ -108,13 +109,13 @@
       </classpath>
     </javac>
     <!-- Build module-info.class -->
-    <javac destdir="${build.mrOutputDir.9}" 
-           nowarn="true" 
-           debug="true" 
-           optimize="false" 
-           deprecation="true" 
-           release="9" 
-           verbose="false" 
+    <javac destdir="${build.mrOutputDir.9}"
+           nowarn="true"
+           debug="true"
+           optimize="false"
+           deprecation="true"
+           release="9"
+           verbose="false"
            fork="false">
       <src>
         <pathelement location="${build.mrSrcDir.9}"/>
@@ -127,14 +128,14 @@
     </javac>
     <!-- Override classes for Java 10+ -->
     <mkdir dir="${build.mrOutputDir.10}"/>
-    <javac destdir="${build.mrOutputDir.10}" 
-           nowarn="true" 
-           debug="true" 
-           optimize="false" 
-           deprecation="true" 
+    <javac destdir="${build.mrOutputDir.10}"
+           nowarn="true"
+           debug="true"
+           optimize="false"
+           deprecation="true"
            source="${compiler.source}"
            target="${compiler.target}"
-           verbose="false" 
+           verbose="false"
            fork="false">
       <src>
         <pathelement location="${build.mrSrcDir.10}"/>
@@ -146,14 +147,14 @@
     </javac>
     <!-- Override classes for Java 11+ -->
     <mkdir dir="${build.mrOutputDir.11}"/>
-    <javac destdir="${build.mrOutputDir.11}" 
-           nowarn="true" 
-           debug="true" 
-           optimize="false" 
-           deprecation="true" 
+    <javac destdir="${build.mrOutputDir.11}"
+           nowarn="true"
+           debug="true"
+           optimize="false"
+           deprecation="true"
            source="${compiler.source}"
            target="${compiler.target}"
-           verbose="false" 
+           verbose="false"
            fork="false">
       <src>
         <pathelement location="${build.mrSrcDir.11}"/>
@@ -170,24 +171,24 @@
   <!-- ====================================================================== -->
 
   <target name="javadoc" description="Generates the Javadoc of the application">
-    <javadoc sourcepath="${build.srcDir}" 
-             destdir="${reporting.outputDirectory}/apidocs" 
-             access="protected" 
-             source="${compiler.source}" 
-             verbose="false" 
-             version="true" 
-             use="true" 
-             author="true" 
-             splitindex="false" 
-             nodeprecated="false" 
-             nodeprecatedlist="false" 
-             notree="false" 
-             noindex="false" 
-             nohelp="false" 
-             nonavbar="false" 
-             serialwarn="false" 
-             charset="ISO-8859-1" 
-             linksource="false" 
+    <javadoc sourcepath="${build.srcDir}"
+             destdir="${reporting.outputDirectory}/apidocs"
+             access="protected"
+             source="${compiler.source}"
+             verbose="false"
+             version="true"
+             use="true"
+             author="true"
+             splitindex="false"
+             nodeprecated="false"
+             nodeprecatedlist="false"
+             notree="false"
+             noindex="false"
+             nohelp="false"
+             nonavbar="false"
+             serialwarn="false"
+             charset="ISO-8859-1"
+             linksource="false"
              breakiterator="false">
       <classpath refid="build.classpath"/>
     </javadoc>
@@ -198,10 +199,10 @@
   <!-- ====================================================================== -->
 
   <target name="package" depends="compile" description="Package the application">
-    <jar jarfile="${build.dir}/${build.finalName}.jar" 
-         compress="true" 
-         index="false" 
-         basedir="${build.outputDir}" 
+    <jar jarfile="${build.dir}/${build.finalName}.jar"
+         compress="true"
+         index="false"
+         basedir="${build.outputDir}"
          excludes="**/package.html">
       <manifest>
         <attribute name="Bundle-Description" value="JSch is a pure Java implementation of SSH2"/>