diff --git a/d3/d3.d.ts b/d3/d3.d.ts
index 939ea0df40..1e278ea68b 100644
--- a/d3/d3.d.ts
+++ b/d3/d3.d.ts
@@ -1,3 +1,8 @@
+// Type definitions for d3JS
+// Project: http://d3js.org/
+// Definitions by: TypeScript samples
+// Definitions: https://github.com/borisyankov/DefinitelyTyped
+
 interface ID3Selectors {
     select: {
         (selector: string): ID3Selection;