diff --git a/lib/conditions.js b/lib/conditions.js
index e884c98..652f825 100644
--- a/lib/conditions.js
+++ b/lib/conditions.js
@@ -1,4 +1,4 @@
-/* 
+/*
  * The MIT License
  *
  * Copyright 2014 Timo Behrmann, Guillaume Chauvet.
@@ -28,7 +28,7 @@ module.exports.paramMatches = function (params) {
     return conditionalChecker(params, function (matches, value) {
         var result;
         if (_.isArray(matches)) {
-            result = _.contains(matches, value);
+            result = _.includes(matches, value);
         } else {
             result = _.isEqual(matches, value);
         }
@@ -49,4 +49,4 @@ var conditionalChecker = module.exports.conditionalChecker = function (params, v
         var matches = params.matches;
         return validator(matches, this.req[scope][variable]);
     };
-};
\ No newline at end of file
+};
diff --git a/lib/validators.js b/lib/validators.js
index b466e29..41edec7 100644
--- a/lib/validators.js
+++ b/lib/validators.js
@@ -36,7 +36,7 @@ var validators = module.exports = {
             return true;
         }
     },
-    equalTo: function(key, submittedValue, myValidator) {
+    equalTo: function (key, submittedValue, myValidator) {
         if (!_.isEqual(submittedValue, this.req[this.scope][myValidator.value])) {
             return true;
         }
@@ -89,7 +89,7 @@ var validators = module.exports = {
             }
             if (isDictionary.key) {
                 var renamedElements = {};
-                var keyError = _.reduce(submittedValue, function(previousError, value, key) {
+                var keyError = _.reduce(submittedValue, function (previousError, value, key) {
                     if (previousError) {
                         return previousError;
                     }
@@ -101,7 +101,7 @@ var validators = module.exports = {
                     }
                     return validateKey.error;
 
-                }, false, this);
+                }.bind(this), false);
                 // Merge renamed elements
                 _.extend(submittedValue, renamedElements);
                 if (keyError) {
@@ -109,7 +109,7 @@ var validators = module.exports = {
                 }
             }
             if (isDictionary.value) {
-                var valueError =  validateCollectionValues(this, submittedValue, isDictionary.value);
+                var valueError = validateCollectionValues(this, submittedValue, isDictionary.value);
                 if (valueError) {
                     return valueError;
                 }
@@ -135,7 +135,7 @@ var validators = module.exports = {
 };
 
 function validateCollectionValues(context, collection, validationRules) {
-    return _.reduce(collection, function(previousError, value, index) {
+    return _.reduce(collection, function (previousError, value, index) {
         if (previousError) {
             return previousError;
         }
@@ -149,7 +149,7 @@ function validateCollectionValues(context, collection, validationRules) {
 
 
 var notSupported = ['len', 'notNull', 'isNull', 'notEmpty'];
-var validatorFunctionKeys = _.difference(_.functions(validator), notSupported);
+var validatorFunctionKeys = _.difference(_.functionsIn(validator), notSupported);
 
 _.each(validatorFunctionKeys, function (element, index, array) {
     if (!_.has(validators, element)) {
diff --git a/package-lock.json b/package-lock.json
new file mode 100644
index 0000000..acb9bd7
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,1740 @@
+{
+  "name": "node-restify-validation",
+  "version": "1.3.0",
+  "lockfileVersion": 1,
+  "requires": true,
+  "dependencies": {
+    "ansi-regex": {
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+      "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-2.1.1.tgz",
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+      "dev": true
+    },
+    "ansi-styles": {
+      "version": "2.2.1",
+      "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-2.2.1.tgz",
+      "integrity": "sha1-tDLdM1i2NM914eRmQ2gkBTPB3b4=",
+      "dev": true
+    },
+    "argparse": {
+      "version": "1.0.10",
+      "resolved": "https://registry.npmjs.org/argparse/-/argparse-1.0.10.tgz",
+      "integrity": "sha512-o5Roy6tNG4SL/FOkCAN6RzjiakZS25RLYFrcMttJqbdd8BWrnA+fGz57iN5Pb06pvBGvl5gQ0B48dJlslXvoTg==",
+      "dev": true,
+      "requires": {
+        "sprintf-js": "~1.0.2"
+      }
+    },
+    "array-filter": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/array-filter/-/array-filter-1.0.0.tgz",
+      "integrity": "sha1-uveeYubvTCpMC4MSMtr/7CUfnYM=",
+      "dev": true
+    },
+    "asn1": {
+      "version": "0.2.4",
+      "resolved": "https://registry.npmjs.org/asn1/-/asn1-0.2.4.tgz",
+      "integrity": "sha512-jxwzQpLQjSmWXgwaCZE9Nz+glAG01yF1QnWgbhGwHI5A6FRIEY6IVqtHhIepHqI7/kyEyQEagBC5mBEFlIYvdg==",
+      "dev": true,
+      "requires": {
+        "safer-buffer": "~2.1.0"
+      }
+    },
+    "assert-plus": {
+      "version": "0.2.0",
+      "resolved": "https://registry.npmjs.org/assert-plus/-/assert-plus-0.2.0.tgz",
+      "integrity": "sha1-104bh+ev/A24qttwIfP+SBAasjQ=",
+      "dev": true
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+      "resolved": "https://registry.npmjs.org/async/-/async-1.5.2.tgz",
+      "integrity": "sha1-7GphrlZIDAw8skHJVhjiCJL5Zyo=",
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+}
diff --git a/package.json b/package.json
index fd63771..e885e8e 100644
--- a/package.json
+++ b/package.json
@@ -29,7 +29,7 @@
   "main": "lib/index",
   "readmeFilename": "README.md",
   "dependencies": {
-    "lodash": "3.10.x",
+    "lodash": "4.17.x",
     "validator": "3.22.x"
   },
   "devDependencies": {