diff --git a/Gruntfile.js b/Gruntfile.js
index 8bdadd0d..ff430a9a 100644
--- a/Gruntfile.js
+++ b/Gruntfile.js
@@ -79,7 +79,10 @@ module.exports = function(grunt) {
         },
         uglify: {
             options: {
-                preserveComments: "some"
+                preserveComments: "some",
+                sourceMap: function (filename) {
+                    return filename.replace(/\.js$/, '.js.map');
+                }
             },
             openseadragon: {
                 src: [ distribution ],
diff --git a/package.json b/package.json
index 3d84b367..16464e41 100644
--- a/package.json
+++ b/package.json
@@ -7,7 +7,7 @@
     "grunt-contrib-compress": "~0.5.0",
     "grunt-contrib-concat": "~0.1.2",
     "grunt-contrib-jshint": "~0.1.1",
-    "grunt-contrib-uglify": "~0.1.1",
+    "grunt-contrib-uglify": "~0.2.0",
     "grunt-contrib-qunit": "~0.2.0",
     "grunt-contrib-connect": "~0.1.2",
     "grunt-contrib-watch": "~0.2.0",