Use strict utm parser

component.json

@@ -15,7 +15,7 @@
     "segmentio/json": "1.0.0",
     "segmentio/protocol": "0.0.2",
     "segmentio/top-domain": "1.0.0",
-    "segmentio/utm-params": "1.0.2",
+    "segmentio/utm-params": "1.1.0",
     "yields/send-json": "1.1.1",
     "yields/store": "1.0.2"
   },

lib/index.js

@@ -164,7 +164,7 @@ Segment.prototype.normalize = function(msg) {
   msg.writeKey = this.options.apiKey;
   ctx.userAgent = navigator.userAgent;
   if (!ctx.library) ctx.library = { name: 'analytics.js', version: this.analytics.VERSION };
-  if (query) ctx.campaign = utm(query);
+  if (query) ctx.campaign = utm.strict(query);
   this.referrerId(query, ctx);
   msg.userId = msg.userId || user.id();
   msg.anonymousId = user.anonymousId();

test/index.test.js

@@ -204,6 +204,24 @@ describe('Segment.io', function() {
         Segment.global = window;
       });
 
+      it('should add only specced fields to .campaign', function() {
+        Segment.global = { navigator: {}, location: {} };
+        Segment.global.location.search = '?utm_source=source&utm_medium=medium&utm_term=term&utm_content=content&utm_campaign=name&utm_test=test&utm_fake=fake';
+        Segment.global.location.hostname = 'localhost';
+        segment.normalize(object);
+        analytics.assert(object);
+        analytics.assert(object.context);
+        analytics.assert(object.context.campaign);
+        analytics.assert(object.context.campaign.source === 'source');
+        analytics.assert(object.context.campaign.medium === 'medium');
+        analytics.assert(object.context.campaign.term === 'term');
+        analytics.assert(object.context.campaign.content === 'content');
+        analytics.assert(object.context.campaign.name === 'name');
+        analytics.assert(object.context.campaign.test === undefined);
+        analytics.assert(object.context.campaign.fake === undefined);
+        Segment.global = window;
+      });
+
       it('should add .referrer.id and .referrer.type', function() {
         Segment.global = { navigator: {}, location: {} };
         Segment.global.location.search = '?utm_source=source&urid=medium';