What should I do for this error: require('connect').json() is undefined

When I typed gulp test, I met this error: require('connect').json() is undefined.. What should I do?

The detail error message as following:

tianjiedeMacBook-Pro:meiyanapp tianjie$ gulp test /Users/tianjie/meiyanruhua/meiyanapp/node_modules/karma/lib/middleware/runner.js:11 var json = require('connect').json(); ^ TypeError: undefined is not a function at Object. (/Users/tianjie/meiyanruhua/meiyanapp/node_modules/karma/lib/middleware/runner.js:11:31) at Module._compile (module.js:460:26) at Object.Module._extensions..js (module.js:478:10) at Module.load (module.js:355:32) at Function.Module._load (module.js:310:12) at Module.require (module.js:365:17) at require (module.js:384:17) at Object. (/Users/tianjie/meiyanruhua/meiyanapp/node_modules/karma/lib/web-server.js:7:24) at Module._compile (module.js:460:26) at Object.Module._extensions..js (module.js:478:10)