diff --git a/karma.conf.js b/karma.conf.js
index 84195cbf2d..429cd2dfe7 100644
--- a/karma.conf.js
+++ b/karma.conf.js
@@ -174,6 +174,8 @@ function addSauceTests (cfg) {
     startConnect: true
   };
 
+  cfg.concurrency = 5;
+
   // for slow browser booting, ostensibly
   cfg.captureTimeout = 120000;
   cfg.browserNoActivityTimeout = 20000;
diff --git a/package.json b/package.json
index 5f2b93ccbd..d9fd1be3c8 100644
--- a/package.json
+++ b/package.json
@@ -329,7 +329,7 @@
     "eslint-plugin-standard": "2.0.1",
     "expect.js": "^0.3.1",
     "istanbul-combine": "^0.3.0",
-    "karma": "^1.1.0",
+    "karma": "1.3.0",
     "karma-browserify": "^5.0.5",
     "karma-chrome-launcher": "^2.0.0",
     "karma-expect": "^1.1.2",