diff --git a/src/index.js b/src/index.js
index 8b3344c..0f7ae9f 100644
--- a/src/index.js
+++ b/src/index.js
@@ -46,6 +46,7 @@ class Mailchimp extends React.Component {
           <input
             {...input}
             key={input.name}
+            disabled={status === "success"}
             onChange={({ target }) => this.setState({ [input.name]: target.value })}
             defaultValue={this.state[input.name]}
           />