diff --git a/project.clj b/project.clj
index f94a9292..dcdf12ec 100644
--- a/project.clj
+++ b/project.clj
@@ -38,4 +38,5 @@
 ;;             "-XX:+PrintCompilation"
 ;;             "-XX:+UnlockDiagnosticVMOptions"
 ;;             "-XX:+PrintInlining"
-             ])
+             ]
+  :javac-options ["-target" "1.6" "-source" "1.6" "-Xlint:-options"])