diff --git a/dagre/dagre-tests.ts b/dagre/dagre-tests.ts
new file mode 100644
index 000000000..f990bf152
--- /dev/null
+++ b/dagre/dagre-tests.ts
@@ -0,0 +1,13 @@
+/// <reference path="dagre.d.ts"/>
+module DagreTests {
+  var gDagre = dagre.graphlib.Graph();
+  gDagre.setGraph({});
+  gDagre.setDefaultEdgeLabel(function(){
+    return ;
+  });
+
+  gDagre.setNode("a", {});
+  gDagre.setEdge("b", "c");
+
+  dagre.layout(gDagre);
+}
diff --git a/dagre/dagre.d.ts b/dagre/dagre.d.ts
new file mode 100644
index 000000000..a9d452826
--- /dev/null
+++ b/dagre/dagre.d.ts
@@ -0,0 +1,29 @@
+// Type definitions for dagre 0.7.0
+// Project: https://github.com/cpettitt/dagre
+// Definitions by: Qinfeng Chen <https://github.com/qinfchen>
+// Definitions: https://github.com/borisyankov/DefinitelyTyped
+declare module Dagre{
+    interface DagreFactory {
+        graphlib: GraphLib;
+        layout(graph: Graph): void;
+    }
+
+    interface Graph {
+        new (): Graph;
+        edges(): string[];
+        edge(id: string): any;
+        nodes(): string[];
+        node(id: string): any;
+        setDefaultEdgeLabel(callback: () => void): void;
+        setEdge(sourceId: string, targetId: string): void;
+        setGraph(options: { [key: string]: any }): void;
+        setNode(id: string, node: { [key: string]: any }): void;
+    }
+
+    interface GraphLib {
+        Graph: Graph
+    }
+}
+
+declare var dagre: Dagre.DagreFactory;
+