diff --git a/package.json b/package.json
index 7eba26f..e5c8750 100644
--- a/package.json
+++ b/package.json
@@ -32,15 +32,14 @@
     "underscore": "^1.6.0"
   },
   "devDependencies": {
-    "browserify": "^6.1.0",
-    "fs-extra": "^0.12.0",
     "browserify": "^4.1.8",
+    "chai": "^1.10.0",
     "coffee-script": "^1.8.0",
     "coffeeify": "^0.7.0",
+    "fs-extra": "^0.12.0",
     "jshint": "^2.5.6",
     "loopback": "^2.5.0",
     "mocha": "^1.19.0",
-    "must": "^0.12.0",
     "supertest": "^0.14.0"
   }
 }
diff --git a/test/browser.test.js b/test/browser.test.js
index 985c26f..01b3132 100644
--- a/test/browser.test.js
+++ b/test/browser.test.js
@@ -1,7 +1,7 @@
 var boot = require('../');
 var fs = require('fs');
 var path = require('path');
-var expect = require('must');
+var expect = require('chai').expect;
 var browserify = require('browserify');
 var sandbox = require('./helpers/sandbox');
 var vm = require('vm');
@@ -91,7 +91,7 @@ function browserifyTestApp(appDir, strategy, next) {
   var bundlePath = sandbox.resolve('browser-app-bundle.js');
   var out = fs.createWriteStream(bundlePath);
   b.bundle().pipe(out);
-  
+
   out.on('error', function(err) { return next(err); });
   out.on('close', function() {
     next(null, bundlePath);
diff --git a/test/compiler.test.js b/test/compiler.test.js
index ba362bd..2bf2e0a 100644
--- a/test/compiler.test.js
+++ b/test/compiler.test.js
@@ -1,7 +1,7 @@
 var boot = require('../');
 var fs = require('fs-extra');
 var path = require('path');
-var expect = require('must');
+var expect = require('chai').expect;
 var sandbox = require('./helpers/sandbox');
 var appdir = require('./helpers/appdir');
 
@@ -379,7 +379,7 @@ describe('compiler', function() {
       var instructions = boot.compile(appdir.PATH);
       expect(instructions.files.boot).to.eql([initJs]);
     });
-    
+
     it('supports `bootDirs` option', function() {
       appdir.createConfigFilesSync();
       var initJs = appdir.writeFileSync('custom-boot/init.js',
@@ -390,7 +390,7 @@ describe('compiler', function() {
       });
       expect(instructions.files.boot).to.eql([initJs]);
     });
-    
+
     it('supports `bootScripts` option', function() {
       appdir.createConfigFilesSync();
       var initJs = appdir.writeFileSync('custom-boot/init.js',
@@ -475,19 +475,19 @@ describe('compiler', function() {
         sourceFile: path.resolve(appdir.PATH, 'models', 'car.coffee')
       });
     });
-    
+
     it('supports `modelSources` option', function() {
       appdir.createConfigFilesSync({}, {}, {
         Car: { dataSource: 'db' }
       });
       appdir.writeConfigFileSync('custom-models/car.json', { name: 'Car' });
       appdir.writeFileSync('custom-models/car.js', '');
-      
+
       var instructions = boot.compile({
         appRootDir: appdir.PATH,
         modelSources: ['./custom-models']
       });
-      
+
       expect(instructions.models).to.have.length(1);
       expect(instructions.models[0]).to.eql({
         name: 'Car',
diff --git a/test/executor.test.js b/test/executor.test.js
index c4f248c..d1d6daf 100644
--- a/test/executor.test.js
+++ b/test/executor.test.js
@@ -2,7 +2,7 @@ var boot = require('../');
 var path = require('path');
 var loopback = require('loopback');
 var assert = require('assert');
-var expect = require('must');
+var expect = require('chai').expect;
 var fs = require('fs-extra');
 var sandbox = require('./helpers/sandbox');
 var appdir = require('./helpers/appdir');