diff --git a/NEWS.md b/NEWS.md
index b9551511..54a883ff 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -1,8 +1,16 @@
 # Changelog
 
-## 9.0.0
+## 9.0.1
 Released 2020-mm-dd
 
+Bug Fixes:
+- While instantiating a map, set the `cache buster` equal to `0` when there are no affected tables in the MapConfig. Thus `layergroupid` has the same structure always:
+  - `${map_id}:${cache_buster}` for anonymous map
+  - `${user}@${template_hash}@${map_id}:${cache_buster}` for named map
+
+## 9.0.0
+Released 2020-06-05
+
 Breaking changes:
 - Remove `/version` endpoint
 - Drop support for Node.js < 12
diff --git a/carto-package.json b/carto-package.json
index 39d481eb..a94347a5 100644
--- a/carto-package.json
+++ b/carto-package.json
@@ -2,8 +2,8 @@
     "name": "carto_windshaft",
     "current_version": {
         "requires": {
-            "node": "^10.15.1",
-            "npm": "^6.4.1",
+            "node": "^12.16.3",
+            "npm": "^6.14.4",
             "mapnik": "==3.0.15.16",
             "crankshaft": "~0.8.1"
         },
diff --git a/lib/api/middlewares/last-updated-time-layergroup.js b/lib/api/middlewares/last-updated-time-layergroup.js
index 1c4a3cab..63c4dac5 100644
--- a/lib/api/middlewares/last-updated-time-layergroup.js
+++ b/lib/api/middlewares/last-updated-time-layergroup.js
@@ -11,6 +11,10 @@ module.exports = function setLastUpdatedTimeToLayergroup () {
             }
 
             if (!affectedTables) {
+                res.locals.cache_buster = 0;
+                layergroup.layergroupid = `${layergroup.layergroupid}:${res.locals.cache_buster}`;
+                layergroup.last_updated = new Date(res.locals.cache_buster).toISOString();
+
                 return next();
             }
 
diff --git a/test/acceptance/layergroupid-test.js b/test/acceptance/layergroupid-test.js
new file mode 100644
index 00000000..2cb8d2ca
--- /dev/null
+++ b/test/acceptance/layergroupid-test.js
@@ -0,0 +1,66 @@
+'use strict';
+
+require('../support/test-helper');
+
+const assert = require('../support/assert');
+const TestClient = require('../support/test-client');
+const { parse: parseLayergroupToken } = require('../../lib/models/layergroup-token');
+
+describe('layergroup id', function () {
+    const suites = [
+        {
+            description: 'with empty layers should respond with cache buster equal to 0',
+            expectedCacheBuster: '0',
+            mapConfig: {
+                version: '1.8.0',
+                layers: []
+            }
+        },
+        {
+            description: 'with layer and dumb query (no affected tables) should respond with cache buster equal to 0',
+            expectedCacheBuster: '0',
+            mapConfig: {
+                version: '1.8.0',
+                layers: [{
+                    type: 'cartodb',
+                    options: {
+                        sql: TestClient.SQL.ONE_POINT
+                    }
+                }]
+            }
+        },
+        {
+            description: 'with layer and legit query should respond with cache buster',
+            expectedCacheBuster: '1234567890123',
+            mapConfig: {
+                version: '1.8.0',
+                layers: [{
+                    type: 'cartodb',
+                    options: {
+                        sql: 'SELECT * FROM test_table'
+                    }
+                }]
+            }
+        }
+    ];
+
+    suites.forEach(({ description, expectedCacheBuster, mapConfig }) => {
+        it(description, function (done) {
+            const testClient = new TestClient(mapConfig);
+
+            testClient.getLayergroup((err, body) => {
+                if (err) {
+                    return done(err);
+                }
+
+                const { layergroupid } = body;
+                assert.ok(typeof layergroupid === 'string');
+
+                const { cacheBuster } = parseLayergroupToken(layergroupid);
+                assert.strictEqual(cacheBuster, expectedCacheBuster);
+
+                testClient.drain(done);
+            });
+        });
+    });
+});