diff --git a/lib/file-list.js b/lib/file-list.js
index c73b98ca5..3422b599a 100644
--- a/lib/file-list.js
+++ b/lib/file-list.js
@@ -230,7 +230,7 @@ Object.defineProperty(List.prototype, 'files', {
     })
 
     var uniqFlat = function (list) {
-      return _.uniq(_.flatten(list), 'path')
+      return _.uniqBy(_.flatten(list), 'path')
     }
 
     return {
diff --git a/package.json b/package.json
index 6c1c6facd..a1fe89e8c 100644
--- a/package.json
+++ b/package.json
@@ -266,7 +266,7 @@
     "graceful-fs": "^4.1.2",
     "http-proxy": "^1.13.0",
     "isbinaryfile": "^3.0.0",
-    "lodash": "^3.8.0",
+    "lodash": "^4.0.0",
     "log4js": "^0.6.28",
     "mime": "^1.3.4",
     "minimatch": "^3.0.0",
diff --git a/test/unit/file-list.spec.js b/test/unit/file-list.spec.js
index 7e22c1652..3c4d09250 100644
--- a/test/unit/file-list.spec.js
+++ b/test/unit/file-list.spec.js
@@ -13,7 +13,7 @@ var config = require('../../lib/config')
 var patterns = (...strings) => strings.map(str => new config.Pattern(str))
 
 function pathsFrom (files) {
-  return _.pluck(from(files), 'path')
+  return _.map(from(files), 'path')
 }
 
 function findFile (path, files) {
@@ -268,7 +268,7 @@ describe('FileList', () => {
 
     it('cancels refreshs', () => {
       var checkResult = files => {
-        expect(_.pluck(files.served, 'path')).to.contain('/some/a.js', '/some/b.js', '/some/c.js')
+        expect(_.map(files.served, 'path')).to.contain('/some/a.js', '/some/b.js', '/some/c.js')
       }
 
       var p1 = list.refresh().then(checkResult)