diff --git a/index.js b/index.js
index 197d8eb..a8ffd78 100644
--- a/index.js
+++ b/index.js
@@ -10,6 +10,7 @@ var yaml = require('js-yaml')
 module.exports = customize()
   .registerEngine('handlebars', require('customize-engine-handlebars'))
   .registerEngine('less', require('customize-engine-less'))
+  .registerEngine('uglify', require('customize-engine-uglify'))
 
 // Customize type for adding methods
 var Customize = customize.Customize
diff --git a/package.json b/package.json
index 9280ab6..77d60c6 100644
--- a/package.json
+++ b/package.json
@@ -33,6 +33,7 @@
     "commander": "^2.6.0",
     "customize-engine-handlebars": "<1.0.0",
     "customize-engine-less": "<1.0.0",
+    "customize-engine-uglify": "<1.0.0",
     "customize-watch": "<1.0.0",
     "customize-write-files": "<1.0.0",
     "debug": "^2.1.2",
diff --git a/test/fixtures/lib1.js b/test/fixtures/lib1.js
new file mode 100644
index 0000000..9cc4519
--- /dev/null
+++ b/test/fixtures/lib1.js
@@ -0,0 +1 @@
+console.log('lib1')
diff --git a/test/fixtures/test-module.js b/test/fixtures/test-module.js
index 1b25f15..877f38a 100644
--- a/test/fixtures/test-module.js
+++ b/test/fixtures/test-module.js
@@ -12,6 +12,12 @@ module.exports = function (builder) {
     },
     less: {
       main: require.resolve('./main.less')
+    },
+    uglify: {
+      files: {
+        'lib1.js': require.resolve('./lib1.js')
+      }
     }
+
   })
 }
diff --git a/test/main-spec.js b/test/main-spec.js
index 779bf8d..70257e3 100644
--- a/test/main-spec.js
+++ b/test/main-spec.js
@@ -43,6 +43,11 @@ function run () {
       },
       less: {
         main: require.resolve('./fixtures/main.less')
+      },
+      uglify: {
+        files: {
+          'lib1.js': require.resolve('./fixtures/lib1.js')
+        }
       }
     })
     .build(swaggerJsonFile, targetDir)
@@ -114,6 +119,9 @@ describe('The CLI interface', function () {
         expect(result.err).to.be.null
         expect(outputFile('index.html'), 'Checking index.html').to.equal('eins=ichi zwei=ni drei=san')
         expect(outputFile('main.css'), 'Checking main.css').to.equal("body{background-color:'#abc'}")
+        expect(outputFile('main.css.map'), 'Source map main.css.map must exist').to.be.ok
+        expect(outputFile('bundle.js'), 'Checking bundle.js').to.equal('console.log("lib1");\n//# sourceMappingURL=bundle.js.map')
+        expect(outputFile('bundle.js.map'), 'Source map bundle.js.map must exist').to.be.ok
       })
   })