diff --git a/src/components/button/Button.js b/src/components/button/Button.js
index 2180d6e51..638e3a478 100644
--- a/src/components/button/Button.js
+++ b/src/components/button/Button.js
@@ -138,13 +138,6 @@ Button.propTypes = {
    */
   n_clicks_timestamp: PropTypes.number,
 
-  /**
-   * A unique identifier for the component, used to improve
-   * performance by React.js while rendering components
-   * See https://reactjs.org/docs/lists-and-keys.html for more info.
-   */
-  key: PropTypes.string,
-
   /**
    * Whether button is in active state. Default: False.
    */