Updating dependency

package.json

@@ -25,7 +25,7 @@
   "dependencies": {
     "aws-sdk": "^2.2.39",
     "browserify": "^13.0.0",
-    "canvas": "git+https://github.com/chearon/node-canvas.git#b62dd3a9fa",
+    "canvas": "^1.6.2",
     "compression": "^1.6.1",
     "d3": "^4.1.1",
     "dotenv": "^2.0.0",