diff --git a/priv/frontend/src/components/Graph.js b/priv/frontend/src/components/Graph.js
index 1f60c3e..a22efae 100644
--- a/priv/frontend/src/components/Graph.js
+++ b/priv/frontend/src/components/Graph.js
@@ -1,4 +1,5 @@
 import React, { Component } from 'react';
+import PropTypes from 'prop-types';
 
 import ms from 'ms';
 import { ResponsiveLine } from '@nivo/line';
@@ -6,6 +7,10 @@ import { ResponsiveLine } from '@nivo/line';
 import './Graph.css';
 
 export default class Graph extends Component {
+  static propTypes = {
+    data: PropTypes.arrayOf(PropTypes.arrayOf(PropTypes.number)).isRequired,
+  }
+
   state = {
     screenWidth: window.innerWidth,
   }
diff --git a/priv/frontend/src/components/Service.js b/priv/frontend/src/components/Service.js
index fee4e35..1dafccc 100644
--- a/priv/frontend/src/components/Service.js
+++ b/priv/frontend/src/components/Service.js
@@ -26,7 +26,7 @@ const Service = ({ graph, name, status, latency, description }) => (
     <p className="description">
       {description}
     </p>
-    {graph ? <Graph width={500} height={175} data={graph} /> : null}
+    {graph ? <Graph data={graph} /> : null}
   </div>
 );