diff --git a/README.md b/README.md
index a60317e..e1e829e 100644
--- a/README.md
+++ b/README.md
@@ -14,7 +14,7 @@ Images can be overlaid on top of each other and repositioned. The function retur
 ## Install
 
 ```shell
-npm install --save merge-images
+npm install --save https://github.com/mkhizeryounas/merge-images/tarball/master
 ```
 
 or for quick testing:
diff --git a/src/index.js b/src/index.js
index 1d1a724..e9769eb 100644
--- a/src/index.js
+++ b/src/index.js
@@ -1,72 +1,84 @@
 // Defaults
 const defaultOptions = {
-	format: 'image/png',
-	quality: 0.92,
-	width: undefined,
-	height: undefined,
-	Canvas: undefined
+  format: "image/png",
+  quality: 0.92,
+  width: undefined,
+  height: undefined,
+  Canvas: undefined
 };
 
 // Return Promise
-const mergeImages = (sources = [], options = {}) => new Promise(resolve => {
-	options = Object.assign({}, defaultOptions, options);
+const mergeImages = (sources = [], options = {}) =>
+  new Promise(resolve => {
+    options = Object.assign({}, defaultOptions, options);
 
-	// Setup browser/Node.js specific variables
-	const canvas = options.Canvas ? new options.Canvas() : window.document.createElement('canvas');
-	const Image = options.Canvas ? options.Canvas.Image : window.Image;
-	if (options.Canvas) {
-		options.quality *= 100;
-	}
+    // Setup browser/Node.js specific variables
+    const canvas = options.Canvas
+      ? new options.Canvas.createCanvas()
+      : window.document.createElement("canvas");
+    const Image = options.Canvas ? options.Canvas.Image : window.Image;
+    if (options.Canvas) {
+      options.quality *= 100;
+    }
 
-	// Load sources
-	const images = sources.map(source => new Promise((resolve, reject) => {
-		// Convert sources to objects
-		if (source.constructor.name !== 'Object') {
-			source = { src: source };
-		}
+    // Load sources
+    const images = sources.map(
+      source =>
+        new Promise((resolve, reject) => {
+          // Convert sources to objects
+          if (source.constructor.name !== "Object") {
+            source = { src: source };
+          }
 
-		// Resolve source and img when loaded
-		const img = new Image();
-		img.onerror = () => reject(new Error('Couldn\'t load image'));
-		img.onload = () => resolve(Object.assign({}, source, { img }));
-		img.src = source.src;
-	}));
+          // Resolve source and img when loaded
+          const img = new Image();
+          img.onerror = () => reject(new Error("Couldn't load image"));
+          img.onload = () => resolve(Object.assign({}, source, { img }));
+          img.src = source.src;
+        })
+    );
 
-	// Get canvas context
-	const ctx = canvas.getContext('2d');
+    // Get canvas context
+    const ctx = canvas.getContext("2d");
 
-	// When sources have loaded
-	resolve(Promise.all(images)
-		.then(images => {
-			// Set canvas dimensions
-			const getSize = dim => options[dim] || Math.max(...images.map(image => image.img[dim]));
-			canvas.width = getSize('width');
-			canvas.height = getSize('height');
+    // When sources have loaded
+    resolve(
+      Promise.all(images).then(images => {
+        // Set canvas dimensions
+        const getSize = dim =>
+          options[dim] || Math.max(...images.map(image => image.img[dim]));
+        canvas.width = getSize("width");
+        canvas.height = getSize("height");
 
-			// Draw images to canvas
-			images.forEach(image => {
-				ctx.globalAlpha = image.opacity ? image.opacity : 1;
-				return ctx.drawImage(image.img, image.x || 0, image.y || 0);
-			});
+        // Draw images to canvas
+        images.forEach(image => {
+          ctx.globalAlpha = image.opacity ? image.opacity : 1;
+          return ctx.drawImage(image.img, image.x || 0, image.y || 0);
+        });
 
-			if (options.Canvas && options.format === 'image/jpeg') {
-				// Resolve data URI for node-canvas jpeg async
-				return new Promise(resolve => {
-					canvas.toDataURL(options.format, {
-						quality: options.quality,
-						progressive: false
-					}, (err, jpeg) => {
-						if (err) {
-							throw err;
-						}
-						resolve(jpeg);
-					});
-				});
-			}
+        if (options.Canvas && options.format === "image/jpeg") {
+          // Resolve data URI for node-canvas jpeg async
+          return new Promise(resolve => {
+            canvas.toDataURL(
+              options.format,
+              {
+                quality: options.quality,
+                progressive: false
+              },
+              (err, jpeg) => {
+                if (err) {
+                  throw err;
+                }
+                resolve(jpeg);
+              }
+            );
+          });
+        }
 
-			// Resolve all other data URIs sync
-			return canvas.toDataURL(options.format, options.quality);
-		}));
-});
+        // Resolve all other data URIs sync
+        return canvas.toDataURL(options.format, options.quality);
+      })
+    );
+  });
 
-export default mergeImages;
+module.exports = mergeImages;