diff --git a/lib/compiler.js b/lib/compiler.js
index e2dea15..c148da2 100644
--- a/lib/compiler.js
+++ b/lib/compiler.js
@@ -7,7 +7,6 @@ var ConfigLoader = require('./config-loader');
 var debug = require('debug')('loopback:boot:compiler');
 var Module = require('module');
 var _ = require('lodash');
-var _s = require('underscore.string');
 
 var FILE_EXTENSION_JSON = '.json';
 
@@ -384,7 +383,7 @@ function tryResolveAppPath(rootDir, relativePath, resolveOptions) {
 function loadModelDefinition(rootDir, jsonFile, allFiles) {
   var definition = require(jsonFile);
   var basename = path.basename(jsonFile, path.extname(jsonFile));
-  definition.name = definition.name || _s.capitalize(_s.camelize(basename));
+  definition.name = definition.name || _.capitalize(_.camelCase(basename));
 
   // find a matching file with a supported extension like `.js` or `.coffee`
   var sourceFile = fixFileExtension(jsonFile, allFiles, true);
diff --git a/lib/executor.js b/lib/executor.js
index 43b2fca..609579d 100644
--- a/lib/executor.js
+++ b/lib/executor.js
@@ -1,5 +1,4 @@
 var assert = require('assert');
-var _ = require('lodash');
 var semver = require('semver');
 var debug = require('debug')('loopback:boot:executor');
 var async = require('async');
@@ -107,7 +106,7 @@ function setHost(app, instructions) {
 
 function setPort(app, instructions) {
   // jscs:disable requireCamelCaseOrUpperCaseIdentifiers
-  var port = _.find([
+  var port = find([
     process.env.npm_config_port,
     process.env.OPENSHIFT_SLS_PORT,
     process.env.OPENSHIFT_NODEJS_PORT,
@@ -116,7 +115,9 @@ function setPort(app, instructions) {
     process.env.npm_package_config_port,
     app.get('port'),
     3000
-  ], _.isFinite);
+  ], function isNumberLike(v) {
+    return Number.isFinite(parseInt(v, 10));
+  });
 
   if (port !== undefined) {
     var portType = typeof port;
@@ -126,6 +127,10 @@ function setPort(app, instructions) {
   }
 }
 
+function find(array, predicate) {
+  return array.filter(predicate)[0];
+}
+
 function setApiRoot(app, instructions) {
   var restApiRoot =
     instructions.config.restApiRoot ||
diff --git a/package.json b/package.json
index c2df7b5..0f5c4eb 100644
--- a/package.json
+++ b/package.json
@@ -26,10 +26,9 @@
     "async": "~0.9.0",
     "commondir": "0.0.1",
     "debug": "^2.0.0",
-    "lodash": "^2.4.1",
+    "lodash": "^3.6.0",
     "semver": "^4.1.0",
-    "toposort": "^0.2.10",
-    "underscore.string": "^3.0.3"
+    "toposort": "^0.2.10"
   },
   "devDependencies": {
     "browserify": "^4.1.8",