Index: lams_build/build_base.xml
===================================================================
diff -u -r8b8155cc92145959a0fd2fd2aef6689c68ddbc22 -rd810074f4b97a88de977bbb34d6362910ea06044
--- lams_build/build_base.xml	(.../build_base.xml)	(revision 8b8155cc92145959a0fd2fd2aef6689c68ddbc22)
+++ lams_build/build_base.xml	(.../build_base.xml)	(revision d810074f4b97a88de977bbb34d6362910ea06044)
@@ -56,6 +56,7 @@
 			<include name="org/jboss/dmr/main/jboss-dmr-*.jar" />
 			<include name="com/fasterxml/jackson/core/jackson-core/main/jackson-core-*.jar" />
 			<include name="com/fasterxml/jackson/core/jackson-databind/main/jackson-databind-*.jar" />
+			<include name="javax/activation/api/main/activation-*.jar" />
 		</fileset>
 		<!-- Optional project own libraries -->
 		<fileset dir="lib" erroronmissingdir="false">
@@ -161,15 +162,14 @@
 		<echo>${ant.project.name}: Compiling Java sources</echo>
 		<javac srcdir="${src.java.dir}"
 			   compiler="modern"
-	           source="10"
-			   target="10"
+	           source="11"
+			   target="11"
                debug="on"
                includeantruntime="false"
 			   debuglevel="lines,vars,source"
                classpathref="libs.classpath"
                destdir="${basedir}/build/classes/java">
                <compilerarg line="-encoding utf-8"/>
-			   <compilerarg line="--add-modules java.activation"/>
 			   <compilerarg line="--add-exports java.base/sun.net.www.protocol.https=ALL-UNNAMED"/>
         </javac>