diff --git a/lib/preprocessor.js b/lib/preprocessor.js
index 95f603b..1181e64 100644
--- a/lib/preprocessor.js
+++ b/lib/preprocessor.js
@@ -53,7 +53,7 @@ function createCoveragePreprocessor (logger, helper, basePath, reporters, covera
   }, {})
 
   // if coverage reporter is not used, do not preprocess the files
-  if (!_.contains(reporters, 'coverage')) {
+  if (!_.includes(reporters, 'coverage')) {
     return function (content, _, done) {
       done(content)
     }
@@ -62,7 +62,7 @@ function createCoveragePreprocessor (logger, helper, basePath, reporters, covera
   // check instrumenter override requests
   function checkInstrumenters () {
     return _.reduce(instrumenterOverrides, function (acc, literal, pattern) {
-      if (!_.contains(_.keys(instrumenters), String(literal))) {
+      if (!_.includes(_.keys(instrumenters), String(literal))) {
         log.error('Unknown instrumenter: %s', literal)
         return false
       }
diff --git a/package.json b/package.json
index 5b09d96..0f6eadb 100644
--- a/package.json
+++ b/package.json
@@ -45,7 +45,7 @@
     "karma-firefox-launcher": "^0.1.6",
     "karma-mocha": "^0.2.0",
     "load-grunt-tasks": "^3.2.0",
-    "lodash": "^3.9.3",
+    "lodash": "^4.5.0",
     "mocha": "^2.2.5",
     "mocks": "0.0.15",
     "sinon": "^1.14.1",