It's mentioned on package that there is no dependency : <img width="335" alt="screen shot 2017-08-04 at 3 36 19 pm" src="https://user-images.githubusercontent.com/13516307/28964520-b7f7c6a2-792a-11e7-9111-1e6a6a265532.png"> But after installation it gave me error : ├── UNMET PEER DEPENDENCY react@15.4.2 ├── UNMET PEER DEPENDENCY socket.io-client@2.0.3 └── socket.io-react@1.2.0 While if you see my package json : "react": "15.4.2", "socket.io-client": "2.0.3", "socket.io-react": "1.2.0", All the required packages are already there. Please test your plugin once before publishing.