diff --git a/relaxngDatatype.changes b/relaxngDatatype.changes
index 72cf618..18ddea7 100644
--- a/relaxngDatatype.changes
+++ b/relaxngDatatype.changes
@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Sun Sep 10 07:09:02 UTC 2017 - fstrba@suse.com
+
+- Specify java source and target levels 1.6 in order to allow
+  building with jdk9
+
 -------------------------------------------------------------------
 Fri Jun  9 10:36:56 UTC 2017 - tchvatal@suse.com
 
diff --git a/relaxngDatatype.spec b/relaxngDatatype.spec
index c403bd3..b514e39 100644
--- a/relaxngDatatype.spec
+++ b/relaxngDatatype.spec
@@ -46,7 +46,7 @@ sed -i -e 's/.$//' copying.txt
 %build
 ant \
     -Dbuild.sysclasspath=only \
-    -Dant.build.javac.source=1.5 -Dant.build.javac.target=1.5
+    -Dant.build.javac.source=1.6 -Dant.build.javac.target=1.6
 
 %install
 install -Dpm 644 %{name}.jar \