diff --git a/src/App.vue b/src/App.vue
index 7e2d054..203b5cf 100644
--- a/src/App.vue
+++ b/src/App.vue
@@ -33,48 +33,6 @@ export default {
 </script>
 
 <style>
-@font-face {
-  font-family: 'Open Sans';
-  src: url('@/assets/fonts/OpenSans-Regular.woff2');
-  font-weight: 400;
-  font-style: normal;
-}
-
-@font-face {
-  font-family: 'Open Sans';
-  src: url('@/assets/fonts/OpenSans-SemiBold.woff2');
-  font-weight: 600;
-  font-style: normal;
-}
-
-@font-face {
-  font-family: 'Open Sans';
-  src: url('@/assets/fonts/OpenSans-Bold.woff2');
-  font-weight: 700;
-  font-style: normal;
-}
-
-@font-face {
-  font-family: 'Open Sans';
-  src: url('@/assets/fonts/OpenSans-Italic.woff2');
-  font-weight: 400;
-  font-style: italic;
-}
-
-@font-face {
-  font-family: 'Open Sans';
-  src: url('@/assets/fonts/OpenSans-SemiBoldItalic.woff2');
-  font-weight: 600;
-  font-style: italic;
-}
-
-@font-face {
-  font-family: 'Open Sans';
-  src: url('@/assets/fonts/OpenSans-BoldItalic.woff2');
-  font-weight: 700;
-  font-style: italic;
-}
-
 #app,
 .dialog,
 input,
diff --git a/src/lib/graphHelper.js b/src/lib/graphHelper.js
index 5637612..5cda3a8 100644
--- a/src/lib/graphHelper.js
+++ b/src/lib/graphHelper.js
@@ -45,10 +45,12 @@ export function buildNodes(graph, dataSources, options) {
       .map(json => JSON.parse(json))
       .filter(item => item[objectType] === TYPE_NODE)
     nodes.forEach(node => {
-      graph.addNode(node[nodeId], {
-        data: node,
-        labelColor: options.style.nodes.label.color
-      })
+      if (node[nodeId]) {
+        graph.addNode(node[nodeId], {
+          data: node,
+          labelColor: options.style.nodes.label.color
+        })
+      }
     })
   }
 }