diff --git a/xml-commons-apis.spec b/xml-commons-apis.spec
index 8d8e2fe..46066e8 100644
--- a/xml-commons-apis.spec
+++ b/xml-commons-apis.spec
@@ -62,7 +62,7 @@ sed -i '/distributionManagement/,/\/distributionManagement/ {d}' *.pom
 %mvn_alias :xml-apis-ext xerces:dom3-xml-apis
 
 %build
-ant -Dant.build.javac.source=1.5 -Dant.build.javac.target=1.5 jar javadoc
+ant -Dant.build.javac.source=1.6 -Dant.build.javac.target=1.6 jar javadoc
 
 # inject OSGi manifests
 jar ufm build/xml-apis.jar %{SOURCE1}