diff --git a/circle.yml b/circle.yml
index d9b15c4..8d7b6ac 100644
--- a/circle.yml
+++ b/circle.yml
@@ -1,3 +1,3 @@
 machine:
   node:
-    version: 6.10.3
+    version: 8.11.1
diff --git a/karma.conf.js b/karma.conf.js
index 0b92d2e..fdcecd7 100644
--- a/karma.conf.js
+++ b/karma.conf.js
@@ -20,12 +20,17 @@ module.exports = function (karma) {
 				'Promise',
 				'matchMedia',
 				'HTMLPictureElement',
-				// the following polyfills are included pending https://github.com/Financial-Times/polyfill-service/issues/653
-				'CustomEvent|always|gated',
-				'fetch|always|gated',
-				'Array.prototype.find|always|gated',
-				'Array.prototype.findIndex|always|gated'
-			].join(',') + '&excludes=Symbol,Symbol.iterator,Symbol.species,Map,Set',
+				'fetch',
+				'Array.prototype.find',
+				'Array.prototype.findIndex',
+				'IntersectionObserver',
+				'Map',
+				'Array.from',
+				'NodeList.prototype.@@iterator',
+				'Array.prototype.@@iterator',
+				'EventSource',
+				'Number.isInteger'
+			].join(',') + '&flags=gated&source=n-syndication-tests',
 			'src/js/*.js',
 			'test/**/*.spec.js'
 		],
@@ -84,7 +89,9 @@ module.exports = function (karma) {
 
 		// Continuous Integration mode
 		// if true, Karma captures browsers, runs the tests and exits
-		singleRun: true
+		singleRun: true,
+		browserNoActivityTimeout: 50000,
+		browserDisconnectTolerance: 3
 	};
 
 	if (process.env.CI) {
diff --git a/package.json b/package.json
index b83a8f3..76f3f4b 100644
--- a/package.json
+++ b/package.json
@@ -4,8 +4,8 @@
   "main": "main.js",
   "description": "Implementation for the syndication indicator, for users who subscribe to the new FT syndication platform",
   "devDependencies": {
-    "@financial-times/n-gage": "^1.17.3",
-    "@financial-times/n-heroku-tools": "^6.19.1",
+    "@financial-times/n-gage": "^2.0.2",
+    "@financial-times/n-heroku-tools": "^7.3.0",
     "autoprefixer": "^6.3.6",
     "babel-core": "^6.25.0",
     "babel-loader": "^7.0.0",
@@ -18,21 +18,21 @@
     "bower": "^1.8.0",
     "bower-resolve-webpack-plugin": "^1.0.3",
     "chai": "^4.0.2",
-    "eslint": "4.2.0",
+    "eslint": "^4.2.0",
     "extract-css-block-webpack-plugin": "^1.3.0",
     "extract-text-webpack-plugin": "^2.1.0",
-    "karma": "^1.4.1",
+    "karma": "^2.0.2",
+    "karma-browserstack-launcher": "^1.3.0",
     "karma-chai": "^0.1.0",
     "karma-chrome-launcher": "^2.0.0",
     "karma-firefox-launcher": "^1.0.1",
     "karma-html-reporter": "^0.2.7",
     "karma-mocha": "^1.3.0",
     "karma-safari-launcher": "^1.0.0",
-    "karma-browserstack-launcher": "^1.3.0",
     "karma-sinon": "^1.0.5",
     "karma-sinon-chai": "^1.3.1",
     "karma-sourcemap-loader": "^0.3.7",
-    "karma-webpack": "^2.0.2",
+    "karma-webpack": "^3.0.0",
     "lintspaces-cli": "^0.6.0",
     "mocha": "^3.4.2",
     "nock": "^9.0.13",
@@ -47,7 +47,7 @@
   "dependencies": {},
   "config": {},
   "engines": {
-    "node": ">=6.10.3"
+    "node": "^8.11.1"
   },
   "scripts": {
     "commit": "commit-wizard",
diff --git a/test/src/js/config.spec.js b/test/src/js/config.spec.js
index 225db8f..c8aee2e 100644
--- a/test/src/js/config.spec.js
+++ b/test/src/js/config.spec.js
@@ -6,6 +6,6 @@ const underTest = require('../../../src/js/config');
 
 describe('./src/js/config', function () {
 	it('config should be an Object', function () {
-		expect(underTest).to.be.an('object');
+		expect(typeof underTest).to.equal('object');
 	});
 });