diff --git a/lib/workers/worker-browser.js b/lib/workers/worker-browser.js
index a72642ae..0f4f4631 100644
--- a/lib/workers/worker-browser.js
+++ b/lib/workers/worker-browser.js
@@ -8,16 +8,12 @@
 'use strict';
 
 self.onmessage = function onmessage(event) {
-  var file = '/bcoin-master.js';
   var env;
 
   self.onmessage = function() {};
 
   env = JSON.parse(event.data);
 
-  if (env.BCOIN_MASTER_URL)
-    file = env.BCOIN_MASTER_URL;
-
-  self.importScripts(file);
+  self.importScripts(env.BCOIN_MASTER_URL);
   self.master.listen(env);
 };
diff --git a/lib/workers/workerpool.js b/lib/workers/workerpool.js
index d9a4de79..efb0c356 100644
--- a/lib/workers/workerpool.js
+++ b/lib/workers/workerpool.js
@@ -57,18 +57,39 @@ util.inherits(WorkerPool, EventEmitter);
 
 /**
  * Whether workers are supported.
- * @const {Boolean}
+ * @type {Boolean}
  */
 
 WorkerPool.support = HAS_WORKERS || HAS_CP;
 
 /**
  * Number of CPUs/cores available.
- * @const {Number}
+ * @type {Number}
  */
 
 WorkerPool.CORES = getCores();
 
+/**
+ * Default worker file.
+ * @const {String}
+ */
+
+WorkerPool.WORKER_FILE = 'worker.js';
+
+/**
+ * Default worker URL.
+ * @const {String}
+ */
+
+WorkerPool.WORKER_URL = '/bcoin-worker.js';
+
+/**
+ * Default master URL.
+ * @const {String}
+ */
+
+WorkerPool.MASTER_URL = '/bcoin-master.js';
+
 /**
  * Global list of workers.
  * @type {Array}
@@ -466,7 +487,7 @@ function Worker(id) {
   this.pending = {};
 
   this.env = {
-    BCOIN_MASTER_URL: process.env.BCOIN_MASTER_URL,
+    BCOIN_MASTER_URL: process.env.BCOIN_MASTER_URL || WorkerPool.MASTER_URL,
     BCOIN_WORKER_NETWORK: Network.type,
     BCOIN_WORKER_ISTTY: process.stdout
       ? (process.stdout.isTTY ? '1' : '0')
@@ -519,7 +540,7 @@ Worker.prototype._init = function _init() {
 
 Worker.prototype._initWebWorkers = function _initWebWorkers() {
   var self = this;
-  var file = '/bcoin-worker.js';
+  var file = WorkerPool.WORKER_URL;
 
   if (process.env.BCOIN_WORKER_URL)
     file = process.env.BCOIN_WORKER_URL;
@@ -553,13 +574,15 @@ Worker.prototype._initWebWorkers = function _initWebWorkers() {
 Worker.prototype._initChildProcess = function _initChildProcess() {
   var self = this;
   var bin = process.argv[0];
-  var file = path.join(__dirname, 'worker.js');
+  var file = WorkerPool.WORKER_FILE;
   var env = Object.assign({}, process.env, this.env);
   var options = { stdio: 'pipe', env: env };
 
   if (process.env.BCOIN_WORKER_FILE)
     file = process.env.BCOIN_WORKER_FILE;
 
+  file = path.resolve(__dirname, file);
+
   this.child = cp.spawn(bin, [file], options);
 
   this.child.unref();
diff --git a/webpack.node.js b/webpack.node.js
index 3f71ae87..a2cb245c 100644
--- a/webpack.node.js
+++ b/webpack.node.js
@@ -36,7 +36,7 @@ module.exports = {
   plugins: [
     new webpack.DefinePlugin({
       'process.env.BCOIN_WORKER_FILE':
-        str(env.BCOIN_WORKER_FILE || "path.join(__dirname, 'bcoin-worker.js')")
+        str(env.BCOIN_WORKER_FILE || 'bcoin-worker.js')
     })
   ]
 };