diff --git a/.travis.yml b/.travis.yml
index 671832f0..8492e564 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -11,6 +11,7 @@ addons:
     - libgif-dev
 
 before_install:
+  - npm install -g npm@2
   - createdb template_postgis
   - psql -c "CREATE EXTENSION postgis" template_postgis
 
diff --git a/config/environments/development.js.example b/config/environments/development.js.example
index bf98ca23..8a1cc7ad 100644
--- a/config/environments/development.js.example
+++ b/config/environments/development.js.example
@@ -13,7 +13,7 @@ var config = {
     // Base URLs for the APIs
     //
     // See http://github.com/CartoDB/Windshaft-cartodb/wiki/Unified-Map-API
-    // 
+    //
     // Base url for the Templated Maps API
     // "/api/v1/map/named" is the new API,
     // "/tiles/template" is for compatibility with versions up to 1.6.x
@@ -33,7 +33,7 @@ var config = {
     // to be able to navigate the map without a reload ?
     // Defaults to 7200 (2 hours)
     ,mapConfigTTL: 7200
-    // idle socket timeout, in milliseconds 
+    // idle socket timeout, in milliseconds
     ,socket_timeout: 600000
     ,enable_cors: true
     ,cache_enabled: false
@@ -147,7 +147,24 @@ var config = {
               // memory. If we want to enforce this behaviour we have to implement a cache eviction policy for the
               // internal cache.
               cacheOnTimeout: true
+          },
+
+          geojson: {
+                dbPoolParams: {
+                      // maximum number of resources to create at any given time
+                      size: 16,
+                      // max milliseconds a resource can go unused before it should be destroyed
+                      idleTimeout: 3000,
+                      // frequency to check for idle resources
+                      reapInterval: 1000
+                },
+
+              // SQL queries will be wrapped with ST_ClipByBox2D
+              // Returning the portion of a geometry falling within a rectangle
+              // It will only work if snapToGrid is enabled
+              clipByBox2d: false, // this requires postgis >=2.2 and geos >=3.5
           }
+
       },
       http: {
           timeout: 2000, // the timeout in ms for a http tile request
@@ -232,7 +249,7 @@ var config = {
         serviceId: 'wadus_service_id'
     }
     // If useProfiler is true every response will be served with an
-    // X-Tiler-Profile header containing elapsed timing for various 
+    // X-Tiler-Profile header containing elapsed timing for various
     // steps taken for producing the response.
     ,useProfiler:true
     // Settings for the health check available at /health
@@ -250,7 +267,10 @@ var config = {
         // whether it should intercept tile render errors an act based on them, enabled by default.
         onTileErrorStrategy: true,
         // whether the affected tables for a given SQL must query directly postgresql or use the SQL API
-        cdbQueryTablesFromPostgres: true
+        cdbQueryTablesFromPostgres: true,
+        // whether in mapconfig is available stats & metadata for each layer
+        layerMetadata: true
+
     }
 };
 
diff --git a/config/environments/production.js.example b/config/environments/production.js.example
index 386f4433..73c68f1d 100644
--- a/config/environments/production.js.example
+++ b/config/environments/production.js.example
@@ -13,7 +13,7 @@ var config = {
     // Base URLs for the APIs
     //
     // See http://github.com/CartoDB/Windshaft-cartodb/wiki/Unified-Map-API
-    // 
+    //
     // Base url for the Templated Maps API
     // "/api/v1/map/named" is the new API,
     // "/tiles/template" is for compatibility with versions up to 1.6.x
@@ -34,7 +34,7 @@ var config = {
     // Defaults to 7200 (2 hours)
     ,mapConfigTTL: 7200
     // idle socket timeout, in milliseconds
-    ,socket_timeout: 600000 
+    ,socket_timeout: 600000
     ,enable_cors: true
     ,cache_enabled: true
     ,log_format: ':req[X-Real-IP] :method :req[Host]:url :status :response-time ms -> :res[Content-Type] (:res[X-Tiler-Profiler])'
@@ -141,7 +141,24 @@ var config = {
               // memory. If we want to enforce this behaviour we have to implement a cache eviction policy for the
               // internal cache.
               cacheOnTimeout: true
+          },
+
+          geojson: {
+                dbPoolParams: {
+                      // maximum number of resources to create at any given time
+                      size: 16,
+                      // max milliseconds a resource can go unused before it should be destroyed
+                      idleTimeout: 3000,
+                      // frequency to check for idle resources
+                      reapInterval: 1000
+                },
+
+              // SQL queries will be wrapped with ST_ClipByBox2D
+              // Returning the portion of a geometry falling within a rectangle
+              // It will only work if snapToGrid is enabled
+              clipByBox2d: false, // this requires postgis >=2.2 and geos >=3.5
           }
+
       },
       http: {
           timeout: 2000, // the timeout in ms for a http tile request
@@ -226,7 +243,7 @@ var config = {
         serviceId: 'wadus_service_id'
     }
     // If useProfiler is true every response will be served with an
-    // X-Tiler-Profile header containing elapsed timing for various 
+    // X-Tiler-Profile header containing elapsed timing for various
     // steps taken for producing the response.
     ,useProfiler:false
     ,serverMetadata: {
@@ -250,7 +267,9 @@ var config = {
         // whether it should intercept tile render errors an act based on them, enabled by default.
         onTileErrorStrategy: true,
         // whether the affected tables for a given SQL must query directly postgresql or use the SQL API
-        cdbQueryTablesFromPostgres: true
+        cdbQueryTablesFromPostgres: true,
+        // whether in mapconfig is available stats & metadata for each layer
+        layerMetadata: false
     }
 };
 
diff --git a/config/environments/staging.js.example b/config/environments/staging.js.example
index f692d2ba..f81b88f7 100644
--- a/config/environments/staging.js.example
+++ b/config/environments/staging.js.example
@@ -13,7 +13,7 @@ var config = {
     // Base URLs for the APIs
     //
     // See http://github.com/CartoDB/Windshaft-cartodb/wiki/Unified-Map-API
-    // 
+    //
     // Base url for the Templated Maps API
     // "/api/v1/maps/named" is the new API,
     // "/tiles/template" is for compatibility with versions up to 1.6.x
@@ -34,7 +34,7 @@ var config = {
     // Defaults to 7200 (2 hours)
     ,mapConfigTTL: 7200
     // idle socket timeout, in milliseconds
-    ,socket_timeout: 600000 
+    ,socket_timeout: 600000
     ,enable_cors: true
     ,cache_enabled: true
     ,log_format: ':req[X-Real-IP] :method :req[Host]:url :status :response-time ms (:res[X-Tiler-Profiler]) -> :res[Content-Type]'
@@ -141,7 +141,24 @@ var config = {
               // memory. If we want to enforce this behaviour we have to implement a cache eviction policy for the
               // internal cache.
               cacheOnTimeout: true
+          },
+
+          geojson: {
+                dbPoolParams: {
+                      // maximum number of resources to create at any given time
+                      size: 16,
+                      // max milliseconds a resource can go unused before it should be destroyed
+                      idleTimeout: 3000,
+                      // frequency to check for idle resources
+                      reapInterval: 1000
+                },
+
+              // SQL queries will be wrapped with ST_ClipByBox2D
+              // Returning the portion of a geometry falling within a rectangle
+              // It will only work if snapToGrid is enabled
+              clipByBox2d: false, // this requires postgis >=2.2 and geos >=3.5
           }
+
       },
       http: {
           timeout: 2000, // the timeout in ms for a http tile request
@@ -226,7 +243,7 @@ var config = {
         serviceId: 'wadus_service_id'
     }
     // If useProfiler is true every response will be served with an
-    // X-Tiler-Profile header containing elapsed timing for various 
+    // X-Tiler-Profile header containing elapsed timing for various
     // steps taken for producing the response.
     ,useProfiler:true
     ,serverMetadata: {
@@ -250,7 +267,9 @@ var config = {
         // whether it should intercept tile render errors an act based on them, enabled by default.
         onTileErrorStrategy: true,
         // whether the affected tables for a given SQL must query directly postgresql or use the SQL API
-        cdbQueryTablesFromPostgres: true
+        cdbQueryTablesFromPostgres: true,
+        // whether in mapconfig is available stats & metadata for each layer
+        layerMetadata: true
     }
 };
 
diff --git a/config/environments/test.js.example b/config/environments/test.js.example
index 13132e9a..0400be6e 100644
--- a/config/environments/test.js.example
+++ b/config/environments/test.js.example
@@ -13,7 +13,7 @@ var config = {
     // Base URLs for the APIs
     //
     // See https://github.com/CartoDB/Windshaft-cartodb/wiki/Unified-Map-API
-    // 
+    //
     // Base url for the Templated Maps API
     // "/api/v1/map/named" is the new API,
     // "/tiles/template" is for compatibility with versions up to 1.6.x
@@ -34,7 +34,7 @@ var config = {
     // Defaults to 7200 (2 hours)
     ,mapConfigTTL: 7200
     // idle socket timeout, in milliseconds
-    ,socket_timeout: 600000 
+    ,socket_timeout: 600000
     ,enable_cors: true
     ,cache_enabled: false
     ,log_format: '[:date] :req[X-Real-IP] :method :req[Host]:url :status :response-time ms -> :res[Content-Type] (:res[X-Tiler-Profiler])'
@@ -141,6 +141,22 @@ var config = {
               // memory. If we want to enforce this behaviour we have to implement a cache eviction policy for the
               // internal cache.
               cacheOnTimeout: true
+          },
+
+          geojson: {
+                dbPoolParams: {
+                      // maximum number of resources to create at any given time
+                      size: 16,
+                      // max milliseconds a resource can go unused before it should be destroyed
+                      idleTimeout: 3000,
+                      // frequency to check for idle resources
+                      reapInterval: 1000
+                },
+
+              // SQL queries will be wrapped with ST_ClipByBox2D
+              // Returning the portion of a geometry falling within a rectangle
+              // It will only work if snapToGrid is enabled
+              clipByBox2d: false // this requires postgis >=2.2 and geos >=3.5
           }
       },
       http: {
@@ -228,7 +244,7 @@ var config = {
         serviceId: 'wadus_service_id'
     }
     // If useProfiler is true every response will be served with an
-    // X-Tiler-Profile header containing elapsed timing for various 
+    // X-Tiler-Profile header containing elapsed timing for various
     // steps taken for producing the response.
     ,useProfiler:true
     // Settings for the health check available at /health
@@ -246,7 +262,9 @@ var config = {
         // whether it should intercept tile render errors an act based on them, enabled by default.
         onTileErrorStrategy: true,
         // whether the affected tables for a given SQL must query directly postgresql or use the SQL API
-        cdbQueryTablesFromPostgres: true
+        cdbQueryTablesFromPostgres: true,
+        // whether in mapconfig is available stats & metadata for each layer
+        layerMetadata: true
     }
 };
 
diff --git a/npm-shrinkwrap.json b/npm-shrinkwrap.json
index 7689461d..37d697fa 100644
--- a/npm-shrinkwrap.json
+++ b/npm-shrinkwrap.json
@@ -1,40 +1,40 @@
 {
   "name": "windshaft-cartodb",
-  "version": "2.20.0",
+  "version": "2.20.1",
   "dependencies": {
     "body-parser": {
       "version": "1.14.2",
-      "from": "body-parser@~1.14.0",
+      "from": "body-parser@>=1.14.0 <1.15.0",
       "resolved": "https://registry.npmjs.org/body-parser/-/body-parser-1.14.2.tgz",
       "dependencies": {
         "bytes": {
-          "version": "2.2.1",
+          "version": "2.2.0",
           "from": "bytes@2.2.0",
           "resolved": "https://registry.npmjs.org/bytes/-/bytes-2.2.0.tgz"
         },
         "content-type": {
           "version": "1.0.1",
-          "from": "content-type@~1.0.1",
+          "from": "content-type@>=1.0.1 <1.1.0",
           "resolved": "https://registry.npmjs.org/content-type/-/content-type-1.0.1.tgz"
         },
         "depd": {
           "version": "1.1.0",
-          "from": "depd@~1.1.0",
+          "from": "depd@>=1.1.0 <1.2.0",
           "resolved": "https://registry.npmjs.org/depd/-/depd-1.1.0.tgz"
         },
         "http-errors": {
           "version": "1.3.1",
-          "from": "http-errors@~1.3.1",
+          "from": "http-errors@>=1.3.1 <1.4.0",
           "resolved": "https://registry.npmjs.org/http-errors/-/http-errors-1.3.1.tgz",
           "dependencies": {
             "inherits": {
               "version": "2.0.1",
-              "from": "inherits@~2.0.1",
+              "from": "inherits@>=2.0.1 <2.1.0",
               "resolved": "https://registry.npmjs.org/inherits/-/inherits-2.0.1.tgz"
             },
             "statuses": {
               "version": "1.2.1",
-              "from": "statuses@1",
+              "from": "statuses@>=1.0.0 <2.0.0",
               "resolved": "https://registry.npmjs.org/statuses/-/statuses-1.2.1.tgz"
             }
           }
@@ -46,7 +46,7 @@
         },
         "on-finished": {
           "version": "2.3.0",
-          "from": "on-finished@~2.3.0",
+          "from": "on-finished@>=2.3.0 <2.4.0",
           "resolved": "https://registry.npmjs.org/on-finished/-/on-finished-2.3.0.tgz",
           "dependencies": {
             "ee-first": {
@@ -63,7 +63,7 @@
         },
         "raw-body": {
           "version": "2.1.5",
-          "from": "raw-body@~2.1.5",
+          "from": "raw-body@>=2.1.5 <2.2.0",
           "resolved": "https://registry.npmjs.org/raw-body/-/raw-body-2.1.5.tgz",
           "dependencies": {
             "unpipe": {
@@ -74,9 +74,9 @@
           }
         },
         "type-is": {
-          "version": "1.6.10",
-          "from": "type-is@~1.6.10",
-          "resolved": "https://registry.npmjs.org/type-is/-/type-is-1.6.10.tgz",
+          "version": "1.6.11",
+          "from": "type-is@>=1.6.10 <1.7.0",
+          "resolved": "https://registry.npmjs.org/type-is/-/type-is-1.6.11.tgz",
           "dependencies": {
             "media-typer": {
               "version": "0.3.0",
@@ -85,12 +85,12 @@
             },
             "mime-types": {
               "version": "2.1.9",
-              "from": "mime-types@~2.1.8",
+              "from": "mime-types@>=2.1.9 <2.2.0",
               "resolved": "https://registry.npmjs.org/mime-types/-/mime-types-2.1.9.tgz",
               "dependencies": {
                 "mime-db": {
                   "version": "1.21.0",
-                  "from": "mime-db@~1.21.0",
+                  "from": "mime-db@>=1.21.0 <1.22.0",
                   "resolved": "https://registry.npmjs.org/mime-db/-/mime-db-1.21.0.tgz"
                 }
               }
@@ -101,12 +101,12 @@
     },
     "cartodb-psql": {
       "version": "0.4.0",
-      "from": "cartodb-psql@~0.4.0",
+      "from": "cartodb-psql@>=0.4.0 <0.5.0",
       "resolved": "https://registry.npmjs.org/cartodb-psql/-/cartodb-psql-0.4.0.tgz",
       "dependencies": {
         "pg": {
           "version": "2.6.2-cdb1",
-          "from": "pg@git://github.com/CartoDB/node-postgres.git#2.6.2-cdb1",
+          "from": "git://github.com/CartoDB/node-postgres.git#2.6.2-cdb1",
           "resolved": "git://github.com/CartoDB/node-postgres.git#836a2dc3131e873fc4ba20cd16e7fb69a7dca98a",
           "dependencies": {
             "generic-pool": {
@@ -125,26 +125,32 @@
     },
     "cartodb-redis": {
       "version": "0.13.0",
-      "from": "cartodb-redis@~0.13.0",
+      "from": "cartodb-redis@>=0.13.0 <0.14.0",
+      "resolved": "https://registry.npmjs.org/cartodb-redis/-/cartodb-redis-0.13.0.tgz",
       "dependencies": {
+        "strftime": {
+          "version": "0.8.4",
+          "from": "strftime@>=0.8.2 <0.9.0",
+          "resolved": "https://registry.npmjs.org/strftime/-/strftime-0.8.4.tgz"
+        },
         "redis-mpool": {
           "version": "0.1.0",
-          "from": "redis-mpool@git://github.com/CartoDB/node-redis-mpool.git#0.1.0",
+          "from": "git://github.com/CartoDB/node-redis-mpool.git#0.1.0",
           "resolved": "git://github.com/CartoDB/node-redis-mpool.git#47510b8d4525ee24aa2e5328976372274a1d144e",
           "dependencies": {
             "generic-pool": {
               "version": "2.1.1",
-              "from": "generic-pool@~2.1.1",
+              "from": "generic-pool@>=2.1.1 <2.2.0",
               "resolved": "https://registry.npmjs.org/generic-pool/-/generic-pool-2.1.1.tgz"
             },
             "redis": {
               "version": "0.12.1",
-              "from": "redis@~0.12.1",
+              "from": "redis@>=0.12.1 <0.13.0",
               "resolved": "https://registry.npmjs.org/redis/-/redis-0.12.1.tgz"
             },
             "hiredis": {
               "version": "0.1.17",
-              "from": "hiredis@~0.1.17",
+              "from": "hiredis@>=0.1.17 <0.2.0",
               "resolved": "https://registry.npmjs.org/hiredis/-/hiredis-0.1.17.tgz",
               "dependencies": {
                 "bindings": {
@@ -154,7 +160,7 @@
                 },
                 "nan": {
                   "version": "1.1.2",
-                  "from": "nan@~1.1.0",
+                  "from": "nan@>=1.1.0 <1.2.0",
                   "resolved": "https://registry.npmjs.org/nan/-/nan-1.1.2.tgz"
                 }
               }
@@ -165,7 +171,7 @@
     },
     "debug": {
       "version": "2.2.0",
-      "from": "debug@~2.2.0",
+      "from": "debug@>=2.2.0 <2.3.0",
       "resolved": "https://registry.npmjs.org/debug/-/debug-2.2.0.tgz",
       "dependencies": {
         "ms": {
@@ -177,27 +183,27 @@
     },
     "dot": {
       "version": "1.0.3",
-      "from": "dot@~1.0.2",
+      "from": "dot@>=1.0.2 <1.1.0",
       "resolved": "https://registry.npmjs.org/dot/-/dot-1.0.3.tgz"
     },
     "express": {
-      "version": "4.13.3",
-      "from": "express@~4.13.3",
-      "resolved": "https://registry.npmjs.org/express/-/express-4.13.3.tgz",
+      "version": "4.13.4",
+      "from": "express@>=4.13.3 <4.14.0",
+      "resolved": "https://registry.npmjs.org/express/-/express-4.13.4.tgz",
       "dependencies": {
         "accepts": {
           "version": "1.2.13",
-          "from": "accepts@~1.2.12",
+          "from": "accepts@>=1.2.12 <1.3.0",
           "resolved": "https://registry.npmjs.org/accepts/-/accepts-1.2.13.tgz",
           "dependencies": {
             "mime-types": {
               "version": "2.1.9",
-              "from": "mime-types@~2.1.8",
+              "from": "mime-types@>=2.1.6 <2.2.0",
               "resolved": "https://registry.npmjs.org/mime-types/-/mime-types-2.1.9.tgz",
               "dependencies": {
                 "mime-db": {
                   "version": "1.21.0",
-                  "from": "mime-db@~1.21.0",
+                  "from": "mime-db@>=1.21.0 <1.22.0",
                   "resolved": "https://registry.npmjs.org/mime-db/-/mime-db-1.21.0.tgz"
                 }
               }
@@ -215,19 +221,19 @@
           "resolved": "https://registry.npmjs.org/array-flatten/-/array-flatten-1.1.1.tgz"
         },
         "content-disposition": {
-          "version": "0.5.0",
-          "from": "content-disposition@0.5.0",
-          "resolved": "https://registry.npmjs.org/content-disposition/-/content-disposition-0.5.0.tgz"
+          "version": "0.5.1",
+          "from": "content-disposition@0.5.1",
+          "resolved": "https://registry.npmjs.org/content-disposition/-/content-disposition-0.5.1.tgz"
         },
         "content-type": {
           "version": "1.0.1",
-          "from": "content-type@~1.0.1",
+          "from": "content-type@>=1.0.1 <1.1.0",
           "resolved": "https://registry.npmjs.org/content-type/-/content-type-1.0.1.tgz"
         },
         "cookie": {
-          "version": "0.1.3",
-          "from": "cookie@0.1.3",
-          "resolved": "https://registry.npmjs.org/cookie/-/cookie-0.1.3.tgz"
+          "version": "0.1.5",
+          "from": "cookie@0.1.5",
+          "resolved": "https://registry.npmjs.org/cookie/-/cookie-0.1.5.tgz"
         },
         "cookie-signature": {
           "version": "1.0.6",
@@ -235,28 +241,28 @@
           "resolved": "https://registry.npmjs.org/cookie-signature/-/cookie-signature-1.0.6.tgz"
         },
         "depd": {
-          "version": "1.0.1",
-          "from": "depd@~1.0.1",
-          "resolved": "https://registry.npmjs.org/depd/-/depd-1.0.1.tgz"
+          "version": "1.1.0",
+          "from": "depd@>=1.1.0 <1.2.0",
+          "resolved": "https://registry.npmjs.org/depd/-/depd-1.1.0.tgz"
         },
         "escape-html": {
-          "version": "1.0.2",
-          "from": "escape-html@1.0.2",
-          "resolved": "https://registry.npmjs.org/escape-html/-/escape-html-1.0.2.tgz"
+          "version": "1.0.3",
+          "from": "escape-html@>=1.0.3 <1.1.0",
+          "resolved": "https://registry.npmjs.org/escape-html/-/escape-html-1.0.3.tgz"
         },
         "etag": {
           "version": "1.7.0",
-          "from": "etag@~1.7.0",
+          "from": "etag@>=1.7.0 <1.8.0",
           "resolved": "https://registry.npmjs.org/etag/-/etag-1.7.0.tgz"
         },
         "finalhandler": {
-          "version": "0.4.0",
-          "from": "finalhandler@0.4.0",
-          "resolved": "https://registry.npmjs.org/finalhandler/-/finalhandler-0.4.0.tgz",
+          "version": "0.4.1",
+          "from": "finalhandler@0.4.1",
+          "resolved": "https://registry.npmjs.org/finalhandler/-/finalhandler-0.4.1.tgz",
           "dependencies": {
             "unpipe": {
               "version": "1.0.0",
-              "from": "unpipe@~1.0.0",
+              "from": "unpipe@>=1.0.0 <1.1.0",
               "resolved": "https://registry.npmjs.org/unpipe/-/unpipe-1.0.0.tgz"
             }
           }
@@ -267,18 +273,18 @@
           "resolved": "https://registry.npmjs.org/fresh/-/fresh-0.3.0.tgz"
         },
         "merge-descriptors": {
-          "version": "1.0.0",
-          "from": "merge-descriptors@1.0.0",
-          "resolved": "https://registry.npmjs.org/merge-descriptors/-/merge-descriptors-1.0.0.tgz"
+          "version": "1.0.1",
+          "from": "merge-descriptors@1.0.1",
+          "resolved": "https://registry.npmjs.org/merge-descriptors/-/merge-descriptors-1.0.1.tgz"
         },
         "methods": {
           "version": "1.1.2",
-          "from": "methods@~1.1.1",
+          "from": "methods@>=1.1.2 <1.2.0",
           "resolved": "https://registry.npmjs.org/methods/-/methods-1.1.2.tgz"
         },
         "on-finished": {
           "version": "2.3.0",
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                                   "from": "block-stream@*",
-                                  "resolved": "https://registry.npmjs.org/block-stream/-/block-stream-0.0.7.tgz"
+                                  "resolved": "https://registry.npmjs.org/block-stream/-/block-stream-0.0.8.tgz"
                                 },
                                 "inherits": {
                                   "version": "2.0.1",
@@ -3249,28 +3372,28 @@
                                   "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-0.2.14.tgz",
                                   "dependencies": {
                                     "lru-cache": {
-                                      "version": "2.5.0",
+                                      "version": "2.7.0",
                                       "from": "lru-cache@2",
-                                      "resolved": "https://registry.npmjs.org/lru-cache/-/lru-cache-2.5.0.tgz"
+                                      "resolved": "https://registry.npmjs.org/lru-cache/-/lru-cache-2.7.0.tgz"
                                     },
                                     "sigmund": {
-                                      "version": "1.0.0",
+                                      "version": "1.0.1",
                                       "from": "sigmund@~1.0.0",
-                                      "resolved": "https://registry.npmjs.org/sigmund/-/sigmund-1.0.0.tgz"
+                                      "resolved": "https://registry.npmjs.org/sigmund/-/sigmund-1.0.1.tgz"
                                     }
                                   }
                                 },
                                 "inherits": {
                                   "version": "2.0.1",
-                                  "from": "inherits@2",
+                                  "from": "inherits@~2.0.1",
                                   "resolved": "https://registry.npmjs.org/inherits/-/inherits-2.0.1.tgz"
                                 }
                               }
                             },
                             "readable-stream": {
-                              "version": "1.0.27-1",
+                              "version": "1.0.33",
                               "from": "readable-stream@~1.0.2",
-                              "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-1.0.27-1.tgz",
+                              "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-1.0.33.tgz",
                               "dependencies": {
                                 "core-util-is": {
                                   "version": "1.0.1",
@@ -3283,13 +3406,13 @@
                                   "resolved": "https://registry.npmjs.org/isarray/-/isarray-0.0.1.tgz"
                                 },
                                 "string_decoder": {
-                                  "version": "0.10.25-1",
+                                  "version": "0.10.31",
                                   "from": "string_decoder@~0.10.x",
-                                  "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-0.10.25-1.tgz"
+                                  "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-0.10.31.tgz"
                                 },
                                 "inherits": {
                                   "version": "2.0.1",
-                                  "from": "inherits@2",
+                                  "from": "inherits@~2.0.1",
                                   "resolved": "https://registry.npmjs.org/inherits/-/inherits-2.0.1.tgz"
                                 }
                               }
@@ -3302,9 +3425,9 @@
                           }
                         },
                         "mkdirp": {
-                          "version": "0.5.0",
+                          "version": "0.5.1",
                           "from": "mkdirp@~0.5.0",
-                          "resolved": "https://registry.npmjs.org/mkdirp/-/mkdirp-0.5.0.tgz",
+                          "resolved": "https://registry.npmjs.org/mkdirp/-/mkdirp-0.5.1.tgz",
                           "dependencies": {
                             "minimist": {
                               "version": "0.0.8",
@@ -3314,14 +3437,14 @@
                           }
                         },
                         "rc": {
-                          "version": "0.5.0",
-                          "from": "rc@~0.5.0",
-                          "resolved": "https://registry.npmjs.org/rc/-/rc-0.5.0.tgz",
+                          "version": "1.1.2",
+                          "from": "rc@~1.1.0",
+                          "resolved": "https://registry.npmjs.org/rc/-/rc-1.1.2.tgz",
                           "dependencies": {
                             "minimist": {
-                              "version": "0.0.10",
-                              "from": "minimist@~0.0.7",
-                              "resolved": "https://registry.npmjs.org/minimist/-/minimist-0.0.10.tgz"
+                              "version": "1.2.0",
+                              "from": "minimist@^1.1.2",
+                              "resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.0.tgz"
                             },
                             "deep-extend": {
                               "version": "0.2.11",
@@ -3334,49 +3457,118 @@
                               "resolved": "https://registry.npmjs.org/strip-json-comments/-/strip-json-comments-0.1.3.tgz"
                             },
                             "ini": {
-                              "version": "1.1.0",
-                              "from": "ini@~1.1.0",
-                              "resolved": "https://registry.npmjs.org/ini/-/ini-1.1.0.tgz"
+                              "version": "1.3.4",
+                              "from": "ini@~1.3.0",
+                              "resolved": "https://registry.npmjs.org/ini/-/ini-1.3.4.tgz"
                             }
                           }
                         },
                         "rimraf": {
-                          "version": "2.2.8",
-                          "from": "rimraf@~2.2.8",
-                          "resolved": "https://registry.npmjs.org/rimraf/-/rimraf-2.2.8.tgz"
+                          "version": "2.4.3",
+                          "from": "rimraf@~2.4.0",
+                          "resolved": "https://registry.npmjs.org/rimraf/-/rimraf-2.4.3.tgz",
+                          "dependencies": {
+                            "glob": {
+                              "version": "5.0.15",
+                              "from": "glob@^5.0.14",
+                              "resolved": "https://registry.npmjs.org/glob/-/glob-5.0.15.tgz",
+                              "dependencies": {
+                                "inflight": {
+                                  "version": "1.0.4",
+                                  "from": "inflight@^1.0.4",
+                                  "resolved": "https://registry.npmjs.org/inflight/-/inflight-1.0.4.tgz",
+                                  "dependencies": {
+                                    "wrappy": {
+                                      "version": "1.0.1",
+                                      "from": "wrappy@1",
+                                      "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.1.tgz"
+                                    }
+                                  }
+                                },
+                                "inherits": {
+                                  "version": "2.0.1",
+                                  "from": "inherits@~2.0.1",
+                                  "resolved": "https://registry.npmjs.org/inherits/-/inherits-2.0.1.tgz"
+                                },
+                                "minimatch": {
+                                  "version": "3.0.0",
+                                  "from": "minimatch@2 || 3",
+                                  "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-3.0.0.tgz",
+                                  "dependencies": {
+                                    "brace-expansion": {
+                                      "version": "1.1.1",
+                                      "from": "brace-expansion@^1.0.0",
+                                      "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.1.tgz",
+                                      "dependencies": {
+                                        "balanced-match": {
+                                          "version": "0.2.0",
+                                          "from": "balanced-match@^0.2.0",
+                                          "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-0.2.0.tgz"
+                                        },
+                                        "concat-map": {
+                                          "version": "0.0.1",
+                                          "from": "concat-map@0.0.1",
+                                          "resolved": "https://registry.npmjs.org/concat-map/-/concat-map-0.0.1.tgz"
+                                        }
+                                      }
+                                    }
+                                  }
+                                },
+                                "once": {
+                                  "version": "1.3.2",
+                                  "from": "once@^1.3.0",
+                                  "resolved": "https://registry.npmjs.org/once/-/once-1.3.2.tgz",
+                                  "dependencies": {
+                                    "wrappy": {
+                                      "version": "1.0.1",
+                                      "from": "wrappy@1",
+                                      "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.1.tgz"
+                                    }
+                                  }
+                                },
+                                "path-is-absolute": {
+                                  "version": "1.0.0",
+                                  "from": "path-is-absolute@^1.0.0",
+                                  "resolved": "https://registry.npmjs.org/path-is-absolute/-/path-is-absolute-1.0.0.tgz"
+                                }
+                              }
+                            }
+                          }
                         }
                       }
-                    },
-                    "set-immediate": {
-                      "version": "0.1.1",
-                      "from": "set-immediate@0.1.1",
-                      "resolved": "https://registry.npmjs.org/set-immediate/-/set-immediate-0.1.1.tgz"
                     }
                   }
                 },
                 "mime": {
                   "version": "1.2.11",
-                  "from": "mime@~1.2.9",
+                  "from": "mime@>=1.2.11 <1.3.0",
                   "resolved": "https://registry.npmjs.org/mime/-/mime-1.2.11.tgz"
                 },
                 "mkdirp": {
-                  "version": "0.3.5",
-                  "from": "mkdirp@~0.3.3",
-                  "resolved": "https://registry.npmjs.org/mkdirp/-/mkdirp-0.3.5.tgz"
+                  "version": "0.5.1",
+                  "from": "mkdirp@>=0.5.0 <0.6.0",
+                  "resolved": "https://registry.npmjs.org/mkdirp/-/mkdirp-0.5.1.tgz",
+                  "dependencies": {
+                    "minimist": {
+                      "version": "0.0.8",
+                      "from": "minimist@0.0.8",
+                      "resolved": "https://registry.npmjs.org/minimist/-/minimist-0.0.8.tgz"
+                    }
+                  }
                 },
                 "optimist": {
                   "version": "0.6.1",
-                  "from": "optimist@~0.6.0",
+                  "from": "optimist@>=0.6.1 <0.7.0",
                   "resolved": "https://registry.npmjs.org/optimist/-/optimist-0.6.1.tgz",
                   "dependencies": {
                     "wordwrap": {
                       "version": "0.0.3",
-                      "from": "wordwrap@~0.0.2",
+                      "from": "wordwrap@>=0.0.2 <0.1.0",
                       "resolved": "https://registry.npmjs.org/wordwrap/-/wordwrap-0.0.3.tgz"
                     },
                     "minimist": {
                       "version": "0.0.10",
-                      "from": "minimist@~0.0.1",
+                      "from": "minimist@>=0.0.1 <0.1.0",
                       "resolved": "https://registry.npmjs.org/minimist/-/minimist-0.0.10.tgz"
                     }
                   }
@@ -3387,22 +3579,22 @@
         },
         "tilelive": {
           "version": "4.5.3",
-          "from": "tilelive@~4.5.3",
+          "from": "tilelive@>=4.5.3 <4.6.0",
           "resolved": "https://registry.npmjs.org/tilelive/-/tilelive-4.5.3.tgz",
           "dependencies": {
             "optimist": {
               "version": "0.6.1",
-              "from": "optimist@~0.6.0",
+              "from": "optimist@>=0.6.0 <0.7.0",
               "resolved": "https://registry.npmjs.org/optimist/-/optimist-0.6.1.tgz",
               "dependencies": {
                 "wordwrap": {
                   "version": "0.0.3",
-                  "from": "wordwrap@~0.0.2",
+                  "from": "wordwrap@>=0.0.2 <0.1.0",
                   "resolved": "https://registry.npmjs.org/wordwrap/-/wordwrap-0.0.3.tgz"
                 },
                 "minimist": {
                   "version": "0.0.10",
-                  "from": "minimist@~0.0.1",
+                  "from": "minimist@>=0.0.1 <0.1.0",
                   "resolved": "https://registry.npmjs.org/minimist/-/minimist-0.0.10.tgz"
                 }
               }
@@ -3416,12 +3608,12 @@
           "dependencies": {
             "generic-pool": {
               "version": "2.1.1",
-              "from": "generic-pool@~2.1.1",
+              "from": "generic-pool@>=2.1.1 <2.2.0",
               "resolved": "https://registry.npmjs.org/generic-pool/-/generic-pool-2.1.1.tgz"
             },
             "mime": {
               "version": "1.2.11",
-              "from": "mime@~1.2.9",
+              "from": "mime@>=1.2.11 <1.3.0",
               "resolved": "https://registry.npmjs.org/mime/-/mime-1.2.11.tgz"
             }
           }
@@ -3438,12 +3630,12 @@
               "dependencies": {
                 "generic-pool": {
                   "version": "2.1.1",
-                  "from": "generic-pool@~2.1.1",
+                  "from": "generic-pool@>=2.1.1 <2.2.0",
                   "resolved": "https://registry.npmjs.org/generic-pool/-/generic-pool-2.1.1.tgz"
                 },
                 "xtend": {
                   "version": "3.0.0",
-                  "from": "xtend@~3.0.0",
+                  "from": "xtend@>=3.0.0 <3.1.0",
                   "resolved": "https://registry.npmjs.org/xtend/-/xtend-3.0.0.tgz"
                 }
               }
@@ -3457,14 +3649,14 @@
           "dependencies": {
             "nan": {
               "version": "1.9.0",
-              "from": "nan@^1.8.4",
+              "from": "nan@>=1.8.4 <2.0.0",
               "resolved": "https://registry.npmjs.org/nan/-/nan-1.9.0.tgz"
             }
           }
         },
         "semver": {
           "version": "5.0.3",
-          "from": "semver@~5.0.3",
+          "from": "semver@>=5.0.3 <5.1.0",
           "resolved": "https://registry.npmjs.org/semver/-/semver-5.0.3.tgz"
         },
         "carto": {
@@ -3474,22 +3666,22 @@
           "dependencies": {
             "mapnik-reference": {
               "version": "6.0.5",
-              "from": "mapnik-reference@~6.0.2",
+              "from": "mapnik-reference@>=6.0.2 <6.1.0",
               "resolved": "https://registry.npmjs.org/mapnik-reference/-/mapnik-reference-6.0.5.tgz"
             },
             "optimist": {
               "version": "0.6.1",
-              "from": "optimist@~0.6.0",
+              "from": "optimist@>=0.6.0 <0.7.0",
               "resolved": "https://registry.npmjs.org/optimist/-/optimist-0.6.1.tgz",
               "dependencies": {
                 "wordwrap": {
                   "version": "0.0.3",
-                  "from": "wordwrap@~0.0.2",
+                  "from": "wordwrap@>=0.0.2 <0.1.0",
                   "resolved": "https://registry.npmjs.org/wordwrap/-/wordwrap-0.0.3.tgz"
                 },
                 "minimist": {
                   "version": "0.0.10",
-                  "from": "minimist@~0.0.1",
+                  "from": "minimist@>=0.0.1 <0.1.0",
                   "resolved": "https://registry.npmjs.org/minimist/-/minimist-0.0.10.tgz"
                 }
               }
@@ -3498,11 +3690,12 @@
         },
         "cartodb-psql": {
           "version": "0.6.1",
-          "from": "cartodb-psql@~0.6.1",
+          "from": "cartodb-psql@>=0.6.1 <0.7.0",
+          "resolved": "https://registry.npmjs.org/cartodb-psql/-/cartodb-psql-0.6.1.tgz",
           "dependencies": {
             "pg": {
               "version": "2.6.2-cdb3",
-              "from": "pg@git://github.com/CartoDB/node-postgres.git#2.6.2-cdb3",
+              "from": "git://github.com/CartoDB/node-postgres.git#2.6.2-cdb3",
               "resolved": "git://github.com/CartoDB/node-postgres.git#069c5296d1a093077feff21719641bb9e71fc50e",
               "dependencies": {
                 "generic-pool": {
@@ -3521,7 +3714,8 @@
         },
         "torque.js": {
           "version": "2.11.4",
-          "from": "torque.js@~2.11.0"
+          "from": "torque.js@>=2.11.0 <2.12.0",
+          "resolved": "https://registry.npmjs.org/torque.js/-/torque.js-2.11.4.tgz"
         },
         "abaculus": {
           "version": "1.1.0-cdb4",
diff --git a/package.json b/package.json
index a90d3873..942f57ca 100644
--- a/package.json
+++ b/package.json
@@ -26,7 +26,7 @@
         "node-statsd": "~0.0.7",
         "underscore"  : "~1.6.0",
         "dot": "~1.0.2",
-        "windshaft": "1.7.0",
+        "windshaft": "1.8.2",
         "step": "~0.0.6",
         "queue-async": "~1.0.7",
         "request": "~2.62.0",
@@ -53,6 +53,6 @@
     },
     "engines": {
         "node": ">=0.8 <0.11",
-        "npm": ">=1.2.1"
+        "npm": ">=2.14.16"
     }
 }
diff --git a/test/acceptance/ported/multilayer.js b/test/acceptance/ported/multilayer.js
index 898ff1a4..7e9b984c 100644
--- a/test/acceptance/ported/multilayer.js
+++ b/test/acceptance/ported/multilayer.js
@@ -400,12 +400,11 @@ describe('multilayer', function() {
           function jsonp_test(body) {
               assert.ok(body.layergroupid);
               expected_token = LayergroupToken.parse(body.layergroupid).token;
-              assert.deepEqual(body.metadata, {
-                  layers: [
-                      { type: "mapnik", "meta":{} },
-                      { type: "mapnik", "meta":{} }
-                  ]
-              });
+              assert.ok(body.metadata.layers.length === 2);
+              assert.ok(body.metadata.layers[0].type === 'mapnik');
+              assert.ok(body.metadata.layers[0].meta);
+              assert.ok(body.metadata.layers[1].type === 'mapnik');
+              assert.ok(body.metadata.layers[1].meta);
               didRunJsonCallback = true;
           }
           eval(res.body);
@@ -1278,4 +1277,3 @@ describe('multilayer', function() {
     });
 
 });
-
diff --git a/test/acceptance/ported/multilayer_interactivity.js b/test/acceptance/ported/multilayer_interactivity.js
index f4bf728e..44b54d4f 100644
--- a/test/acceptance/ported/multilayer_interactivity.js
+++ b/test/acceptance/ported/multilayer_interactivity.js
@@ -374,4 +374,3 @@ describe('multilayer interactivity and layers order', function() {
     chaosScenarios.forEach(testInteractivityLayersOrderScenario);
 
 });
-