diff --git a/project.clj b/project.clj
index ef40cbd..260ea35 100644
--- a/project.clj
+++ b/project.clj
@@ -4,6 +4,7 @@
   :license {:name "Eclipse Public License"
             :url "http://www.eclipse.org/legal/epl-v10.html"}
   :min-lein-version "2.0.0"
+  :javac-target "1.7"
   :dependencies [[org.clojure/clojure "1.5.1"]
                  [org.clojure/core.match "0.2.0-rc5"]
                  [clj-time "0.5.1"]