diff --git a/tpls/constant.tpl.ejs b/tpls/constant.tpl.ejs
index 72485c3..5d22fbf 100644
--- a/tpls/constant.tpl.ejs
+++ b/tpls/constant.tpl.ejs
@@ -1,5 +1,8 @@
+;(function(){
+'use strict'
+
 angular.module("<%- moduleName %>"<% if (deps) { %>, <%= JSON.stringify(deps) %><% } %>)
 <% constants.forEach(function(constant) { %>
 .constant("<%- constant.name %>", <%= constant.value %>)
 <% }) %>
-;
\ No newline at end of file
+})();
\ No newline at end of file