diff --git a/jzlib.changes b/jzlib.changes
index f451cf7..1f0e080 100644
--- a/jzlib.changes
+++ b/jzlib.changes
@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Fri Sep  8 09:23:28 UTC 2017 - fstrba@suse.com
+
+- Specify java source and target level 1.6 in order to allow build
+  with jdk9
+
 -------------------------------------------------------------------
 Fri Jun  9 10:39:43 UTC 2017 - tchvatal@suse.com
 
diff --git a/jzlib.spec b/jzlib.spec
index 1155716..c8286b3 100644
--- a/jzlib.spec
+++ b/jzlib.spec
@@ -56,7 +56,7 @@ rm misc/mindtermsrc-v121-compression.patch
 
 %build
 ant \
-    -Dant.build.javac.source=1.5 -Dant.build.javac.target=1.5 \
+    -Dant.build.javac.source=1.6 -Dant.build.javac.target=1.6 \
     dist
 
 %install