diff --git a/UPGRADING-SOCKJS.md b/UPGRADING-SOCKJS.md
new file mode 100644
index 000000000..45f5f6df3
--- /dev/null
+++ b/UPGRADING-SOCKJS.md
@@ -0,0 +1,15 @@
+Upgrading SockJS
+=======================================================================
+
+When SockJS needs to be upgraded, you will also need to patch it to work
+properly with nw.js. In the minified script, replace all instances of this:
+
+```javascript
+.call(this,"undefined"!=typeof global?global:"undefined"!=typeof self?self:"undefined"!=typeof window?window:{})
+```
+
+With this:
+
+```javascript
+.call(this,window)
+```
diff --git a/index.template.html b/index.template.html
index 404c0030b..75fc1a83f 100644
--- a/index.template.html
+++ b/index.template.html
@@ -120,7 +120,7 @@ ga('send', 'pageview');
 <script src="//play.pokemonshowdown.com/data/pokedex-mini.js?"></script>
 <script src="//play.pokemonshowdown.com/data/typechart.js?"></script>
 <script src="//play.pokemonshowdown.com/js/battle.js?"></script>
-<script src="//play.pokemonshowdown.com/js/lib/sockjs-1.4.0.min.js"></script>
+<script src="//play.pokemonshowdown.com/js/lib/sockjs-1.4.0-nwjsfix.min.js"></script>
 <script src="//play.pokemonshowdown.com/js/lib/color-thief.min.js"></script>
 
 <script>
diff --git a/js/lib/sockjs-1.4.0-nwjsfix.min.js b/js/lib/sockjs-1.4.0-nwjsfix.min.js
new file mode 100644
index 000000000..5a9f55417
--- /dev/null
+++ b/js/lib/sockjs-1.4.0-nwjsfix.min.js
@@ -0,0 +1,3 @@
+/* sockjs-client v1.4.0 | http://sockjs.org | MIT license */
+!function(t){if("object"==typeof exports&&"undefined"!=typeof module)module.exports=t();else if("function"==typeof define&&define.amd)define([],t);else{("undefined"!=typeof window?window:"undefined"!=typeof global?global:"undefined"!=typeof self?self:this).SockJS=t()}}(function(){return function i(s,a,l){function c(e,t){if(!a[e]){if(!s[e]){var n="function"==typeof require&&require;if(!t&&n)return n(e,!0);if(u)return u(e,!0);var r=new Error("Cannot find module '"+e+"'");throw r.code="MODULE_NOT_FOUND",r}var o=a[e]={exports:{}};s[e][0].call(o.exports,function(t){return c(s[e][1][t]||t)},o,o.exports,i,s,a,l)}return a[e].exports}for(var u="function"==typeof require&&require,t=0;t<l.length;t++)c(l[t]);return c}({1:[function(n,r,t){(function(t){"use strict";var e=n("./transport-list");r.exports=n("./main")(e),"_sockjs_onload"in t&&setTimeout(t._sockjs_onload,1)}).call(this,window)},{"./main":14,"./transport-list":16}],2:[function(t,e,n){"use strict";var r=t("inherits"),o=t("./event");function i(){o.call(this),this.initEvent("close",!1,!1),this.wasClean=!1,this.code=0,this.reason=""}r(i,o),e.exports=i},{"./event":4,"inherits":54}],3:[function(t,e,n){"use strict";var r=t("inherits"),o=t("./eventtarget");function i(){o.call(this)}r(i,o),i.prototype.removeAllListeners=function(t){t?delete this._listeners[t]:this._listeners={}},i.prototype.once=function(e,n){var r=this,o=!1;this.on(e,function t(){r.removeListener(e,t),o||(o=!0,n.apply(this,arguments))})},i.prototype.emit=function(){var t=arguments[0],e=this._listeners[t];if(e){for(var n=arguments.length,r=new Array(n-1),o=1;o<n;o++)r[o-1]=arguments[o];for(var i=0;i<e.length;i++)e[i].apply(this,r)}},i.prototype.on=i.prototype.addListener=o.prototype.addEventListener,i.prototype.removeListener=o.prototype.removeEventListener,e.exports.EventEmitter=i},{"./eventtarget":5,"inherits":54}],4:[function(t,e,n){"use strict";function r(t){this.type=t}r.prototype.initEvent=function(t,e,n){return this.type=t,this.bubbles=e,this.cancelable=n,this.timeStamp=+new Date,this},r.prototype.stopPropagation=function(){},r.prototype.preventDefault=function(){},r.CAPTURING_PHASE=1,r.AT_TARGET=2,r.BUBBLING_PHASE=3,e.exports=r},{}],5:[function(t,e,n){"use strict";function r(){this._listeners={}}r.prototype.addEventListener=function(t,e){t in this._listeners||(this._listeners[t]=[]);var n=this._listeners[t];-1===n.indexOf(e)&&(n=n.concat([e])),this._listeners[t]=n},r.prototype.removeEventListener=function(t,e){var n=this._listeners[t];if(n){var r=n.indexOf(e);-1===r||(1<n.length?this._listeners[t]=n.slice(0,r).concat(n.slice(r+1)):delete this._listeners[t])}},r.prototype.dispatchEvent=function(){var t=arguments[0],e=t.type,n=1===arguments.length?[t]:Array.apply(null,arguments);if(this["on"+e]&&this["on"+e].apply(this,n),e in this._listeners)for(var r=this._listeners[e],o=0;o<r.length;o++)r[o].apply(this,n)},e.exports=r},{}],6:[function(t,e,n){"use strict";var r=t("inherits"),o=t("./event");function i(t){o.call(this),this.initEvent("message",!1,!1),this.data=t}r(i,o),e.exports=i},{"./event":4,"inherits":54}],7:[function(t,e,n){"use strict";var r=t("json3"),o=t("./utils/iframe");function i(t){(this._transport=t).on("message",this._transportMessage.bind(this)),t.on("close",this._transportClose.bind(this))}i.prototype._transportClose=function(t,e){o.postMessage("c",r.stringify([t,e]))},i.prototype._transportMessage=function(t){o.postMessage("t",t)},i.prototype._send=function(t){this._transport.send(t)},i.prototype._close=function(){this._transport.close(),this._transport.removeAllListeners()},e.exports=i},{"./utils/iframe":47,"json3":55}],8:[function(t,e,n){"use strict";var f=t("./utils/url"),r=t("./utils/event"),h=t("json3"),d=t("./facade"),o=t("./info-iframe-receiver"),p=t("./utils/iframe"),m=t("./location"),v=function(){};e.exports=function(l,t){var c,u={};t.forEach(function(t){t.facadeTransport&&(u[t.facadeTransport.transportName]=t.facadeTransport)}),u[o.transportName]=o,l.bootstrap_iframe=function(){var a;p.currentWindowId=m.hash.slice(1);r.attachEvent("message",function(e){if(e.source===parent&&(void 0===c&&(c=e.origin),e.origin===c)){var n;try{n=h.parse(e.data)}catch(t){return void v("bad json",e.data)}if(n.windowId===p.currentWindowId)switch(n.type){case"s":var t;try{t=h.parse(n.data)}catch(t){v("bad json",n.data);break}var r=t[0],o=t[1],i=t[2],s=t[3];if(v(r,o,i,s),r!==l.version)throw new Error('Incompatible SockJS! 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diff --git a/preactalpha.template.html b/preactalpha.template.html
index 61cd0725d..6f578099f 100644
--- a/preactalpha.template.html
+++ b/preactalpha.template.html
@@ -55,7 +55,7 @@
 
 	<script defer src="/js/battle-dex.js?"></script>
 	<script defer src="/js/client-main.js?"></script>
-	<script defer src="/js/lib/sockjs-1.4.0.min.js?"></script>
+	<script defer src="/js/lib/sockjs-1.4.0-nwjsfix.min.js?"></script>
 	<script defer src="/js/client-connection.js?"></script>
 	<script defer src="/js/lib/preact.min.js?"></script>
 	<script defer src="/js/panels.js?"></script>
diff --git a/testclient-beta.html b/testclient-beta.html
index c981edac6..a9690f211 100644
--- a/testclient-beta.html
+++ b/testclient-beta.html
@@ -56,7 +56,7 @@
 
 	<script src="js/battle-dex.js"></script>
 	<script src="js/client-main.js"></script>
-	<script src="js/lib/sockjs-1.4.0.min.js"></script>
+	<script src="js/lib/sockjs-1.4.0-nwjsfix.min.js"></script>
 	<script src="js/client-connection.js"></script>
 	<script src="js/lib/preact.min.js"></script>
 	<script src="js/panels.js"></script>
diff --git a/testclient.html b/testclient.html
index a6b62e82c..902e18111 100644
--- a/testclient.html
+++ b/testclient.html
@@ -90,7 +90,7 @@
 		<script src="data/pokedex-mini-bw.js" onerror="loadRemoteData(this.src)"></script>
 		<script src="data/typechart.js" onerror="loadRemoteData(this.src)"></script>
 		<script src="js/battle.js"></script>
-		<script src="js/lib/sockjs-1.4.0.min.js"></script>
+		<script src="js/lib/sockjs-1.4.0-nwjsfix.min.js"></script>
 		<script src="js/lib/color-thief.min.js"></script>
 
 		<script>