diff --git a/index.d.ts b/index.d.ts
new file mode 100644
index 0000000..7d993bf
--- /dev/null
+++ b/index.d.ts
@@ -0,0 +1,33 @@
+declare namespace StackBlur {
+    function image(
+        img: HTMLImageElement | string,
+        canvas: HTMLCanvasElement | string,
+        radius: number,
+        blurAlphaChannel?: boolean): void;
+
+    function canvasRGBA(
+        canvas: HTMLCanvasElement,
+        topX: number, topY: number,
+        width: number, height: number,
+        radius: number): void;
+
+    function canvasRGB(
+        canvas: HTMLCanvasElement,
+        topX: number, topY: number,
+        width: number, height: number,
+        radius: number): void;
+
+    function imageDataRGBA(
+        data: ImageData,
+        topX: number, topY: number,
+        width: number, height: number,
+        radius: number): ImageData;
+
+    function imageDataRGB(
+        data: ImageData,
+        topX: number, topY: number,
+        width: number, height: number,
+        radius: number): ImageData;
+}
+
+export = StackBlur;