diff --git a/packages/algoliasearch-helper/src/SearchParameters/index.js b/packages/algoliasearch-helper/src/SearchParameters/index.js
index b37836cf72..464c1da5a0 100644
--- a/packages/algoliasearch-helper/src/SearchParameters/index.js
+++ b/packages/algoliasearch-helper/src/SearchParameters/index.js
@@ -3,7 +3,6 @@
 var keys = require('lodash/keys');
 var intersection = require('lodash/intersection');
 var forOwn = require('lodash/forOwn');
-var forEach = require('lodash/forEach');
 var filter = require('lodash/filter');
 var reduce = require('lodash/reduce');
 var isNaN = require('lodash/isNaN');
@@ -500,7 +499,7 @@ SearchParameters._parseNumbers = function(partialState) {
     'minProximity'
   ];
 
-  forEach(numberKeys, function(k) {
+  numberKeys.forEach(function(k) {
     var value = partialState[k];
     if (typeof value === 'string') {
       var parsedValue = parseFloat(value);
@@ -520,9 +519,11 @@ SearchParameters._parseNumbers = function(partialState) {
 
   if (partialState.numericRefinements) {
     var numericRefinements = {};
-    forEach(partialState.numericRefinements, function(operators, attribute) {
+    Object.keys(partialState.numericRefinements).forEach(function(attribute) {
+      var operators = partialState.numericRefinements[attribute] || {};
       numericRefinements[attribute] = {};
-      forEach(operators, function(values, operator) {
+      Object.keys(operators).forEach(function(operator) {
+        var values = operators[operator];
         var parsedValues = values.map(function(v) {
           if (Array.isArray(v)) {
             return v.map(function(vPrime) {
@@ -554,7 +555,8 @@ SearchParameters._parseNumbers = function(partialState) {
 SearchParameters.make = function makeSearchParameters(newParameters) {
   var instance = new SearchParameters(newParameters);
 
-  forEach(newParameters.hierarchicalFacets, function(facet) {
+  var hierarchicalFacets = newParameters.hierarchicalFacets || [];
+  hierarchicalFacets.forEach(function(facet) {
     if (facet.rootPath) {
       var currentRefinement = instance.getHierarchicalRefinement(facet.name);
 
@@ -902,9 +904,11 @@ SearchParameters.prototype = {
       var newNumericRefinements = reduce(this.numericRefinements, function(memo, operators, key) {
         var operatorList = {};
 
-        forEach(operators, function(values, operator) {
+        operators = operators || {};
+        Object.keys(operators).forEach(function(operator) {
+          var values = operators[operator] || [];
           var outValues = [];
-          forEach(values, function(value) {
+          values.forEach(function(value) {
             var predicateResult = attribute({val: value, op: operator}, key, 'numeric');
             if (!predicateResult) outValues.push(value);
           });
@@ -1593,7 +1597,7 @@ SearchParameters.prototype = {
     return this.mutateMe(function mergeWith(newInstance) {
       var ks = keys(params);
 
-      forEach(ks, function(k) {
+      ks.forEach(function(k) {
         newInstance[k] = parsedParams[k];
       });
 
diff --git a/packages/algoliasearch-helper/src/algoliasearch.helper.js b/packages/algoliasearch-helper/src/algoliasearch.helper.js
index aa19a98c79..30a57f4ea5 100644
--- a/packages/algoliasearch-helper/src/algoliasearch.helper.js
+++ b/packages/algoliasearch-helper/src/algoliasearch.helper.js
@@ -9,7 +9,6 @@ var events = require('events');
 var inherits = require('./functions/inherits');
 
 var flatten = require('lodash/flatten');
-var forEach = require('lodash/forEach');
 var isEmpty = require('lodash/isEmpty');
 
 var url = require('./url');
@@ -306,10 +305,15 @@ AlgoliaSearchHelper.prototype.searchForFacetValues = function(facet, query, maxF
 
     content = Array.isArray(content) ? content[0] : content;
 
-    content.facetHits = forEach(content.facetHits, function(f) {
-      f.isRefined = isDisjunctive ?
-        state.isDisjunctiveFacetRefined(facet, f.value) :
-        state.isFacetRefined(facet, f.value);
+    content.facetHits = Array.isArray(content.facetHits)
+      ? content.facetHits
+      : [];
+
+    content.facetHits = content.facetHits.map(function(f) {
+      f.isRefined = isDisjunctive
+        ? state.isDisjunctiveFacetRefined(facet, f.value)
+        : state.isFacetRefined(facet, f.value);
+      return f;
     });
 
     return content;
@@ -1130,7 +1134,7 @@ AlgoliaSearchHelper.prototype.getRefinements = function(facetName) {
   if (this.state.isConjunctiveFacet(facetName)) {
     var conjRefinements = this.state.getConjunctiveRefinements(facetName);
 
-    forEach(conjRefinements, function(r) {
+    conjRefinements.forEach(function(r) {
       refinements.push({
         value: r,
         type: 'conjunctive'
@@ -1139,7 +1143,7 @@ AlgoliaSearchHelper.prototype.getRefinements = function(facetName) {
 
     var excludeRefinements = this.state.getExcludeRefinements(facetName);
 
-    forEach(excludeRefinements, function(r) {
+    excludeRefinements.forEach(function(r) {
       refinements.push({
         value: r,
         type: 'exclude'
@@ -1148,7 +1152,7 @@ AlgoliaSearchHelper.prototype.getRefinements = function(facetName) {
   } else if (this.state.isDisjunctiveFacet(facetName)) {
     var disjRefinements = this.state.getDisjunctiveRefinements(facetName);
 
-    forEach(disjRefinements, function(r) {
+    disjRefinements.forEach(function(r) {
       refinements.push({
         value: r,
         type: 'disjunctive'
@@ -1158,7 +1162,9 @@ AlgoliaSearchHelper.prototype.getRefinements = function(facetName) {
 
   var numericRefinements = this.state.getNumericRefinements(facetName);
 
-  forEach(numericRefinements, function(value, operator) {
+  Object.keys(numericRefinements).forEach(function(operator) {
+    var value = numericRefinements[operator];
+
     refinements.push({
       value: value,
       operator: operator,
@@ -1262,7 +1268,8 @@ AlgoliaSearchHelper.prototype._dispatchAlgoliaResponse = function(states, queryI
   if (this._currentNbQueries === 0) this.emit('searchQueueEmpty');
 
   var results = content.results.slice();
-  forEach(states, function(s) {
+
+  states.forEach(function(s) {
     var state = s.state;
     var queriesCount = s.queriesCount;
     var helper = s.helper;
diff --git a/packages/algoliasearch-helper/src/requestBuilder.js b/packages/algoliasearch-helper/src/requestBuilder.js
index 3615f77a6e..1ba4575632 100644
--- a/packages/algoliasearch-helper/src/requestBuilder.js
+++ b/packages/algoliasearch-helper/src/requestBuilder.js
@@ -1,6 +1,5 @@
 'use strict';
 
-var forEach = require('lodash/forEach');
 var reduce = require('lodash/reduce');
 var merge = require('lodash/merge');
 
@@ -21,7 +20,7 @@ var requestBuilder = {
     });
 
     // One for each disjunctive facets
-    forEach(state.getRefinedDisjunctiveFacets(), function(refinedFacet) {
+    state.getRefinedDisjunctiveFacets().forEach(function(refinedFacet) {
       queries.push({
         indexName: index,
         params: requestBuilder._getDisjunctiveFacetSearchParams(state, refinedFacet)
@@ -29,7 +28,7 @@ var requestBuilder = {
     });
 
     // maybe more to get the root level of hierarchical facets when activated
-    forEach(state.getRefinedHierarchicalFacets(), function(refinedFacet) {
+    state.getRefinedHierarchicalFacets().forEach(function(refinedFacet) {
       var hierarchicalFacet = state.getHierarchicalFacetByName(refinedFacet);
 
       var currentRefinement = state.getHierarchicalRefinement(refinedFacet);
@@ -135,10 +134,12 @@ var requestBuilder = {
 
     var numericFilters = [];
 
-    forEach(state.numericRefinements, function(operators, attribute) {
-      forEach(operators, function(values, operator) {
+    Object.keys(state.numericRefinements).forEach(function(attribute) {
+      var operators = state.numericRefinements[attribute] || {};
+      Object.keys(operators).forEach(function(operator) {
+        var values = operators[operator] || [];
         if (facetName !== attribute) {
-          forEach(values, function(value) {
+          values.forEach(function(value) {
             if (Array.isArray(value)) {
               var vs = value.map(function(v) {
                 return attribute + operator + v;
@@ -179,30 +180,40 @@ var requestBuilder = {
   _getFacetFilters: function(state, facet, hierarchicalRootLevel) {
     var facetFilters = [];
 
-    forEach(state.facetsRefinements, function(facetValues, facetName) {
-      forEach(facetValues, function(facetValue) {
+    var facetsRefinements = state.facetsRefinements || {};
+    Object.keys(facetsRefinements).forEach(function(facetName) {
+      var facetValues = facetsRefinements[facetName] || [];
+      facetValues.forEach(function(facetValue) {
         facetFilters.push(facetName + ':' + facetValue);
       });
     });
 
-    forEach(state.facetsExcludes, function(facetValues, facetName) {
-      forEach(facetValues, function(facetValue) {
+    var facetsExcludes = state.facetsExcludes || {};
+    Object.keys(facetsExcludes).forEach(function(facetName) {
+      var facetValues = facetsExcludes[facetName] || [];
+      facetValues.forEach(function(facetValue) {
         facetFilters.push(facetName + ':-' + facetValue);
       });
     });
 
-    forEach(state.disjunctiveFacetsRefinements, function(facetValues, facetName) {
-      if (facetName === facet || !facetValues || facetValues.length === 0) return;
+    var disjunctiveFacetsRefinements = state.disjunctiveFacetsRefinements || {};
+    Object.keys(disjunctiveFacetsRefinements).forEach(function(facetName) {
+      var facetValues = disjunctiveFacetsRefinements[facetName] || [];
+      if (facetName === facet || !facetValues || facetValues.length === 0) {
+        return;
+      }
       var orFilters = [];
 
-      forEach(facetValues, function(facetValue) {
+      facetValues.forEach(function(facetValue) {
         orFilters.push(facetName + ':' + facetValue);
       });
 
       facetFilters.push(orFilters);
     });
 
-    forEach(state.hierarchicalFacetsRefinements, function(facetValues, facetName) {
+    var hierarchicalFacetsRefinements = state.hierarchicalFacetsRefinements || {};
+    Object.keys(hierarchicalFacetsRefinements).forEach(function(facetName) {
+      var facetValues = hierarchicalFacetsRefinements[facetName] || [];
       var facetValue = facetValues[0];
 
       if (facetValue === undefined) {