diff --git a/lib/cartodb/backends/dataview.js b/lib/cartodb/backends/dataview.js
index f541cac6..44db254e 100644
--- a/lib/cartodb/backends/dataview.js
+++ b/lib/cartodb/backends/dataview.js
@@ -22,7 +22,6 @@ function DataviewBackend(analysisBackend) {
 
 module.exports = DataviewBackend;
 
-
 DataviewBackend.prototype.getDataview = function (mapConfigProvider, user, params, callback) {
     var self = this;
 
@@ -125,7 +124,7 @@ DataviewBackend.prototype.getDataview = function (mapConfigProvider, user, param
             if ( queryRewriteData ) {
                 if ( node.type === 'source' ) {
                     var filters = node.filters; // TODO: node.getFilters() when available in camshaft
-                    var filters_disabler = _.keys(filters).reduce(
+                    var filters_disabler = Object.keys(filters).reduce(
                         function(disabler, filter_id){ disabler[filter_id] = false; return disabler; },
                         {}
                     );
diff --git a/lib/cartodb/models/mapconfig_overviews_adapter.js b/lib/cartodb/models/mapconfig_overviews_adapter.js
index f9f580a8..f5cfde9e 100644
--- a/lib/cartodb/models/mapconfig_overviews_adapter.js
+++ b/lib/cartodb/models/mapconfig_overviews_adapter.js
@@ -36,7 +36,7 @@ MapConfigOverviewsAdapter.prototype.getLayers = function(username, layers, analy
                            if ( node ) {
                                node = node.rootNode;
                                filters = node.filters; // TODO: node.getFilters() when available in camshaft
-                               var filters_disabler = _.keys(filters).reduce(
+                               var filters_disabler = Object.keys(filters).reduce(
                                    function(disabler, filter_id){ disabler[filter_id] = false; return disabler; },
                                    {}
                                );
diff --git a/lib/cartodb/utils/overviews_query_rewriter.js b/lib/cartodb/utils/overviews_query_rewriter.js
index e2c7e29d..95a02378 100644
--- a/lib/cartodb/utils/overviews_query_rewriter.js
+++ b/lib/cartodb/utils/overviews_query_rewriter.js
@@ -161,7 +161,7 @@ function overviews_query_with_zoom_expression(query, overviews, zoom_level_expre
     var replaced_query = query;
     var sql = "WITH\n  _vovw_scale AS ( SELECT " + zoom_level_expression + " AS _vovw_z )";
     var replacement;
-    _.each(_.keys(overviews), function(table) {
+    _.each(Object.keys(overviews), function(table) {
         var table_overviews = overviews[table];
         var table_view = overviews_view_name(table);
         var schema = table_overviews.schema;
@@ -181,7 +181,7 @@ function overviews_query_with_zoom_expression(query, overviews, zoom_level_expre
 function overviews_query_with_definite_zoom(query, overviews, zoom_level) {
     var replaced_query = query;
     var replacement;
-    _.each(_.keys(overviews), function(table) {
+    _.each(Object.keys(overviews), function(table) {
         var table_overviews = overviews[table];
         var schema = table_overviews.schema;
         replacement = overview_table_for_zoom_level(table_overviews, zoom_level);
@@ -196,7 +196,7 @@ function overview_table_for_zoom_level(table_overviews, zoom_level) {
     if ( table_overviews ) {
         overview_table = table_overviews[zoom_level];
         if ( !overview_table ) {
-            _.every(_.keys(table_overviews).sort(function(x,y){ return x-y; }), function(overview_zoom) {
+            _.every(Object.keys(table_overviews).sort(function(x,y){ return x-y; }), function(overview_zoom) {
               if ( +overview_zoom > +zoom_level ) {
                   overview_table = table_overviews[overview_zoom];
                   return false;