diff --git a/web/database.py b/web/database.py
index c058a8a..66b8ab5 100644
--- a/web/database.py
+++ b/web/database.py
@@ -31,22 +31,22 @@ class NodeDB:
 			node.ip, node.label, node.version, now, now,
 			node.label, node.version, now))
 
-	def insert_edge(self, edge):
+        def insert_edge(self, edge, uploaded_by):
 		now = int(time.time())
 		self.cur.execute('''
-			INSERT INTO edges (a, b, first_seen, last_seen)
-			VALUES (%s, %s, %s, %s)
+                        INSERT INTO edges (a, b, first_seen, last_seen, uploaded_by)
+                        VALUES (%s, %s, %s, %s, %s)
 			ON DUPLICATE KEY
 			UPDATE last_seen = %s''', (
-			edge.a.ip, edge.b.ip, now, now,
-			now))
+                                edge.a.ip, edge.b.ip, now, now, uploaded_by,
+                                now))
 
-	def insert_graph(self, nodes, edges):
+        def insert_graph(self, nodes, edges, uploaded_by):
 		for n in nodes.itervalues():
 			self.insert_node(n)
 
 		for e in edges:
-			self.insert_edge(e)
+                        self.insert_edge(e, uploaded_by)
 
 
 
diff --git a/web/database.sql b/web/database.sql
index d09fbee..3c8714e 100644
--- a/web/database.sql
+++ b/web/database.sql
@@ -12,6 +12,7 @@ CREATE TABLE `edges` (
   `b` varchar(39) NOT NULL,
   `first_seen` int(11) NOT NULL,
   `last_seen` int(11) NOT NULL,
+  `uploaded_by` varchar(200) NOT NULL,
   PRIMARY KEY (`a`,`b`)
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8;
 
diff --git a/web/graphData.py b/web/graphData.py
index 8161358..32f33ad 100644
--- a/web/graphData.py
+++ b/web/graphData.py
@@ -34,9 +34,11 @@ def insert_graph_data(config, data, mail, ip):
 	if len(nodes) == 0 or len(edges) == 0:
 		return 'No valid nodes or edges'
 
+        uploaded_by = ip
+
 	try:
 		with NodeDB(config) as db:
-                        db.insert_graph(nodes, edges)
+                        db.insert_graph(nodes, edges, uploaded_by)
 	except Exception:
                 traceback.print_exc()
 		return 'Database failure'
diff --git a/web/static/network.js b/web/static/network.js
index 667cb9c..f364800 100644
--- a/web/static/network.js
+++ b/web/static/network.js
@@ -55,7 +55,7 @@ function drawNetwork() {
 		var edge = edges[i];
 		var highlight = edge.sourceNode.hover || edge.targetNode.hover;
 		var color = highlight ? 'rgba(0, 0, 0, 0.5)' : 'rgba(0, 0, 0, 0.15)';
-		
+
 		drawLine(ctx,
 			edge.sourceNode.x, edge.sourceNode.y,
 			edge.targetNode.x, edge.targetNode.y,
@@ -204,7 +204,7 @@ $(document).ready(function() {
 
 	jQuery.getJSON('/static/graph.json', function(data) {
 		nodes = data.nodes;
-		edges = data.edges;
+        edges = data.edges;
 
 		// Calculate node radiuses
 		for (var i = 0; i < nodes.length; ++i) {
@@ -222,6 +222,7 @@ $(document).ready(function() {
 			node.textColor = node.color;
 		}
 
+        var newEdges = []
 		// Find node references for edges
 		for (var i = 0; i < edges.length; ++i) {
 			var edge = edges[i];
@@ -235,13 +236,17 @@ $(document).ready(function() {
 					edge.targetNode = nodes[n];
 			}
 
+            if (!edge.sourceNode || !edge.targetNode)
+               continue;
+
 			edge.sourceNode.edges.push(edge);
 			edge.targetNode.edges.push(edge);
 			edge.sourceNode.peers.push(edge.targetNode);
 			edge.targetNode.peers.push(edge.sourceNode);
+
+            newEdges.push(edge);
 		}
-
-
+        edges = newEdges;
 
 		// Set update time
 		var delta = Math.round(new Date().getTime() / 1000) - data.created;
@@ -362,7 +367,7 @@ $(document).ready(function() {
 	$(canvas).mouseup(function(e) {
 		var mouse = mousePos(e);
 		var mouseMoved =
-			Math.abs(mouse.x - mouseDownPos.x) + 
+			Math.abs(mouse.x - mouseDownPos.x) +
 			Math.abs(mouse.y - mouseDownPos.y) > 3
 
 		if (!mouseMoved) {