diff --git a/flavors/swagger-ui-react/index.js b/flavors/swagger-ui-react/index.js
index 71af7359c0a..2b91a1e796e 100644
--- a/flavors/swagger-ui-react/index.js
+++ b/flavors/swagger-ui-react/index.js
@@ -79,7 +79,7 @@ export default class SwaggerUI extends React.Component {
 }
 
 SwaggerUI.propTypes = {
-  spec: PropTypes.oneOf([
+  spec: PropTypes.oneOfType([
     PropTypes.string,
     PropTypes.object,
   ]),