diff --git a/lib/forcegraph.js b/lib/forcegraph.js
index 5a8fa3e..0a97e44 100644
--- a/lib/forcegraph.js
+++ b/lib/forcegraph.js
@@ -8,6 +8,7 @@ define(["d3"], function (d3) {
     var el
     var doAnimation = false
     var intNodes = []
+    var intLinks = []
     var highlight
 
     var LINK_DISTANCE = 70
@@ -212,13 +213,26 @@ define(["d3"], function (d3) {
         newNodesDict[d.o.id] = d
       })
 
-      var intLinks = data.graph.links.filter( function (d) {
+      var oldLinks = {}
+
+      intLinks.forEach( function (d) {
+        oldLinks[d.o.id] = d
+      })
+
+      intLinks = data.graph.links.filter( function (d) {
         return !d.vpn
       }).map( function (d) {
-        var source = newNodesDict[d.source.id]
-        var target = newNodesDict[d.target.id]
+        var e
+        if (d.id in oldLinks)
+          e = oldLinks[d.id]
+        else
+          e = {}
 
-        return {o: d, source: source, target: target}
+        e.o = d
+        e.source = newNodesDict[d.source.id]
+        e.target = newNodesDict[d.target.id]
+
+        return e
       })
 
       link = vis.select("g.links")