diff --git a/build/build.xml b/build/build.xml
index d82225ca..7ec16173 100644
--- a/build/build.xml
+++ b/build/build.xml
@@ -106,8 +106,8 @@
         <replace file="${build.work}/src/helma/main/Server.java"
             token="__builddate__" value="${TODAY}"/>
         <javac srcdir="${build.work}/src"
-            source="1.4"
-            target="1.4"
+            source="1.5"
+            target="1.5"
             destdir="${build.classes}"
             debug="${debug}"
             deprecation="${deprecation}"