diff --git a/app.js b/app.js
index 6b24a64..441baab 100644
--- a/app.js
+++ b/app.js
@@ -23,7 +23,7 @@ var linksData = [
     {"source": "Emerald", "target": "Rachel"}
 ];
 
-var nodes = d3.select("g")
+var nodes = d3.select("#nodes")
         .selectAll("circle")
         .data(nodesData)
         .enter()
diff --git a/index.html b/index.html
index fa84eee..3032a97 100644
--- a/index.html
+++ b/index.html
@@ -8,7 +8,7 @@
     </head>
     <body>
         <svg>
-            <g></g>
+            <g id="nodes"></g>
         </svg>
         <script src="app.js" charset="utf-8"></script>
     </body>
