diff --git a/debian/build.xml b/debian/build.xml
index e212832..7aa526e 100644
--- a/debian/build.xml
+++ b/debian/build.xml
@@ -31,7 +31,7 @@
   <target name="jar">
     <mkdir dir="${slf4j-api.dir}/${class.dir}"/>
     <javac srcdir="${slf4j-api.dir}/${source.dir}" destdir="${slf4j-api.dir}/${class.dir}"
-      debug="true" source="1.5"/>
+      debug="true" source="1.5" target="1.5" />
 
     <jar jarfile="${slf4j-api.jar}">
       <fileset dir="${slf4j-api.dir}/${class.dir}">
@@ -41,7 +41,7 @@
 
     <mkdir dir="${slf4j-jcl.dir}/${class.dir}"/>
     <javac srcdir="${slf4j-jcl.dir}/${source.dir}" destdir="${slf4j-jcl.dir}/${class.dir}"
-      debug="true" source="1.5" classpath="${slf4j-api.jar}"/>
+      debug="true" source="1.5" target="1.5" classpath="${slf4j-api.jar}"/>
 
     <jar jarfile="${slf4j-jcl.jar}">
       <fileset dir="${slf4j-jcl.dir}/${class.dir}">
@@ -51,7 +51,7 @@
 
     <mkdir dir="${slf4j-jdk14.dir}/${class.dir}"/>
     <javac srcdir="${slf4j-jdk14.dir}/${source.dir}" destdir="${slf4j-jdk14.dir}/${class.dir}"
-      debug="true" source="1.4" classpath="${slf4j-api.jar}"/>
+      debug="true" source="1.4" target="1.4" classpath="${slf4j-api.jar}"/>
 
     <jar jarfile="${slf4j-jdk14.jar}">
       <fileset dir="${slf4j-jdk14.dir}/${class.dir}">
@@ -61,7 +61,7 @@
 
     <mkdir dir="${slf4j-log4j12.dir}/${class.dir}"/>
     <javac srcdir="${slf4j-log4j12.dir}/${source.dir}" destdir="${slf4j-log4j12.dir}/${class.dir}"
-      debug="true" source="1.5" classpath="${slf4j-api.jar}"/>
+      debug="true" source="1.5" target="1.5" classpath="${slf4j-api.jar}"/>
 
     <jar jarfile="${slf4j-log4j12.jar}">
       <fileset dir="${slf4j-log4j12.dir}/${class.dir}">
@@ -71,7 +71,7 @@
 
     <mkdir dir="${slf4j-nop.dir}/${class.dir}"/>
     <javac srcdir="${slf4j-nop.dir}/${source.dir}" destdir="${slf4j-nop.dir}/${class.dir}"
-      debug="true" source="1.5" classpath="${slf4j-api.jar}"/>
+      debug="true" source="1.5" target="1.5" classpath="${slf4j-api.jar}"/>
 
     <jar jarfile="${slf4j-nop.jar}">
       <fileset dir="${slf4j-nop.dir}/${class.dir}">
@@ -81,7 +81,7 @@
 
     <mkdir dir="${slf4j-simple.dir}/${class.dir}"/>
     <javac srcdir="${slf4j-simple.dir}/${source.dir}" destdir="${slf4j-simple.dir}/${class.dir}"
-      debug="true" source="1.5" classpath="${slf4j-api.jar}"/>
+      debug="true" source="1.5" target="1.5" classpath="${slf4j-api.jar}"/>
 
     <jar jarfile="${slf4j-simple.jar}">
       <fileset dir="${slf4j-simple.dir}/${class.dir}">
@@ -91,7 +91,7 @@
 
     <mkdir dir="${slf4j-migrator.dir}/${class.dir}"/>
     <javac srcdir="${slf4j-migrator.dir}/${source.dir}" destdir="${slf4j-migrator.dir}/${class.dir}"
-      debug="true" source="1.5" classpath="${slf4j-api.jar}"/>
+      debug="true" source="1.5" target="1.5" classpath="${slf4j-api.jar}"/>
 
     <jar jarfile="${slf4j-migrator.jar}">
       <fileset dir="${slf4j-migrator.dir}/${class.dir}">
@@ -101,7 +101,7 @@
 
     <mkdir dir="${jcl-over-slf4j.dir}/${class.dir}"/>
     <javac srcdir="${jcl-over-slf4j.dir}/${source.dir}" destdir="${jcl-over-slf4j.dir}/${class.dir}"
-      debug="true" source="1.5" classpath="${slf4j-api.jar}"/>
+      debug="true" source="1.5" target="1.5" classpath="${slf4j-api.jar}"/>
 
     <jar jarfile="${jcl-over-slf4j.jar}">
       <fileset dir="${jcl-over-slf4j.dir}/${class.dir}">
@@ -111,7 +111,7 @@
 
     <mkdir dir="${jul-to-slf4j.dir}/${class.dir}"/>
     <javac srcdir="${jul-to-slf4j.dir}/${source.dir}" destdir="${jul-to-slf4j.dir}/${class.dir}"
-      debug="true" source="1.5" classpath="${slf4j-api.jar}"/>
+      debug="true" source="1.5" target="1.5" classpath="${slf4j-api.jar}"/>
 
     <jar jarfile="${jul-to-slf4j.jar}">
       <fileset dir="${jul-to-slf4j.dir}/${class.dir}">
@@ -121,7 +121,7 @@
 
     <mkdir dir="${log4j-over-slf4j.dir}/${class.dir}"/>
     <javac srcdir="${log4j-over-slf4j.dir}/${source.dir}" destdir="${log4j-over-slf4j.dir}/${class.dir}"
-      debug="true" source="1.5" classpath="${slf4j-api.jar}"/>
+      debug="true" source="1.5" target="1.5" classpath="${slf4j-api.jar}"/>
 
     <jar jarfile="${log4j-over-slf4j.jar}">
       <fileset dir="${log4j-over-slf4j.dir}/${class.dir}">
@@ -131,7 +131,7 @@
 
     <mkdir dir="${slf4j-ext.dir}/${class.dir}"/>
     <javac srcdir="${slf4j-ext.dir}/${source.dir}" destdir="${slf4j-ext.dir}/${class.dir}"
-      debug="true" source="1.5" classpath="${slf4j-api.jar}:/usr/share/java/javassist.jar:/usr/share/java/commons-lang.jar"/>
+      debug="true" source="1.5" target="1.5" classpath="${slf4j-api.jar}:/usr/share/java/javassist.jar:/usr/share/java/commons-lang.jar"/>
 
     <jar jarfile="${slf4j-ext.jar}">
       <fileset dir="${slf4j-ext.dir}/${class.dir}">
diff --git a/debian/changelog b/debian/changelog
index 3064695..61f3718 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,11 @@
+libslf4j-java (1.5.8-2ubuntu1) karmic; urgency=low
+
+  * Update Standards-Version to 3.8.3
+  * Compile classes for Java 1.4 / 1.5, don't allow classes
+    to be compiled in Java 1.6 format
+
+ -- Ludovic Claude <ludovic.claude@laposte.net>  Fri, 04 Sep 2009 17:26:32 +0100
+
 libslf4j-java (1.5.8-2) unstable; urgency=low
 
   * Upload to unstable.
diff --git a/debian/control b/debian/control
index 0df1c21..df22072 100644
--- a/debian/control
+++ b/debian/control
@@ -6,7 +6,7 @@
 Build-Depends: cdbs, debhelper (>= 6), ant, default-jdk
 Build-Depends-Indep: maven-repo-helper, liblog4j1.2-java,
  libcommons-logging-java, libcommons-lang-java, libjavassist-java
-Standards-Version: 3.8.1
+Standards-Version: 3.8.3
 Homepage: http://www.slf4j.org/
 Vcs-Svn: svn://svn.debian.org/svn/pkg-java/trunk/libslf4j-java
 Vcs-Browser: http://svn.debian.org/wsvn/pkg-java/trunk/libslf4j-java