diff --git a/apache-commons-cli.spec b/apache-commons-cli.spec
index 7c4cb2d..bcfdf25 100644
--- a/apache-commons-cli.spec
+++ b/apache-commons-cli.spec
@@ -31,7 +31,7 @@ command line arguments and options.
 %mvn_file : commons-cli %{name}
 
 %build
-%mvn_build
+%mvn_build -- -Dmaven.compiler.source=1.6 -Dmaven.compiler.target=1.6
 
 %install
 %mvn_install