diff --git a/README.md b/README.md
index 5263366..6d6e063 100755
--- a/README.md
+++ b/README.md
@@ -19,7 +19,7 @@ Automatic socket connection from an URL string
 import VueNativeSock from 'vue-native-websocket'
 Vue.use(VueNativeSock, 'ws://localhost:9090')
 ```
-Set sub-protocol, this is optional option and default it's empty string.
+Set sub-protocol, this is optional option and default is empty string.
 ``` js
 import VueNativeSock from 'vue-native-websocket'
 Vue.use(VueNativeSock, 'ws://localhost:9090', 'my-protocol')