diff --git a/src/index.js b/src/index.js
index 958a6ed..edc4d27 100644
--- a/src/index.js
+++ b/src/index.js
@@ -86,7 +86,7 @@ function getStateFromProps(props) {
 
 export default class JSONTree extends React.Component {
   static propTypes = {
-    data: PropTypes.oneOfType([PropTypes.array, PropTypes.object]).isRequired,
+    data: PropTypes.oneOfType([PropTypes.array, PropTypes.object]),
     hideRoot: PropTypes.bool,
     theme: PropTypes.oneOfType([PropTypes.object, PropTypes.string]),
     invertTheme: PropTypes.bool,