diff --git a/client/webpack-hot-middleware-client.js b/client/webpack-hot-middleware-client.js
index 7869bd98024cb..1489b34dba2dc 100644
--- a/client/webpack-hot-middleware-client.js
+++ b/client/webpack-hot-middleware-client.js
@@ -1,3 +1,4 @@
+import 'event-source-polyfill'
 import webpackHotMiddlewareClient from 'webpack-hot-middleware/client?autoConnect=false'
 import Router from '../lib/router'
 
diff --git a/package.json b/package.json
index e58f8914cb1da..7c5dbfdf2bee0 100644
--- a/package.json
+++ b/package.json
@@ -72,6 +72,7 @@
     "cross-spawn": "5.1.0",
     "del": "3.0.0",
     "etag": "1.8.1",
+    "event-source-polyfill": "0.0.12",
     "find-up": "2.1.0",
     "fresh": "0.5.2",
     "friendly-errors-webpack-plugin": "1.6.1",
diff --git a/yarn.lock b/yarn.lock
index 978008c6867ed..943b5621b0a3c 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2499,6 +2499,10 @@ event-emitter@~0.3.5:
     d "1"
     es5-ext "~0.10.14"
 
+event-source-polyfill@0.0.12:
+  version "0.0.12"
+  resolved "https://registry.yarnpkg.com/event-source-polyfill/-/event-source-polyfill-0.0.12.tgz#e539cd67fdef2760a16aa5262fa98134df52e3af"
+
 events@^1.0.0:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/events/-/events-1.1.1.tgz#9ebdb7635ad099c70dcc4c2a1f5004288e8bd924"