diff --git a/build.xml b/build.xml
index eb6a80b..dcf3522 100644
--- a/build.xml
+++ b/build.xml
@@ -58,8 +58,8 @@
 		       destdir="${target.classes.dir}"
 		       debug="true"
 		       classpathref="compile.classpath"
-		       source="${jdk.source}"
-		       target="${jdk.target}"
+		       source="1.8"
+		       target="1.8"
 		  />
 		
 		<copy todir="${target.classes.dir}">
@@ -73,8 +73,8 @@
 		<javac srcdir="${test.src.dir}"
 		       destdir="${target.test-classes.dir}"
 		       debug="true"
-		       source="${jdk.source}"
-		       target="${jdk.target}">
+		       source="1.8"
+		       target="1.8">
 			<classpath>
 				<path refid="test.classpath" />
 				<pathelement location="${target.classes.dir}" />