 
   <% if (datauri) { %>grunt.loadNpmTasks "grunt-datauri"<% } %>
 
-  grunt.registerTask "make_production", ["concat_css", "imagemin"]
+  grunt.registerTask "make_production", ["concat_css", "csso", "imagemin"]
 
   grunt.registerTask "server", "connect"
   grunt.registerTask "default", "watch"

    concat_css:
      all:
        src: 'app/compile/css/**/*.css'
        dest: 'app/production/css/concat_application.css'

    watch:
      options:

        options:
          report: 'min'
        files:
          'app/production/css/application.css' : ['app/production/css/application.css']

    imagemin:
      dynamic:
