diff --git a/package.json b/package.json
index f43fb2752..04a6f6994 100644
--- a/package.json
+++ b/package.json
@@ -61,7 +61,7 @@
     "test": "npm run lint && npm run format:check && if test \"$BROWSERS\" = \"1\" ; then npm run test:browser; else npm run test:node; fi",
     "test:node": "mocha --reporter dot --require test/support/server.js test/index.js",
     "test:browser": "zuul test/index.js",
-    "build": "webpack --config ./support/webpack.config.js",
+    "build": "webpack --config ./support/webpack.config.js --config ./support/prod.config.js",
     "format:check": "prettier --check 'lib/**/*.js' 'test/**/*.js' 'support/**/*.js'",
     "format:fix": "prettier --write 'lib/**/*.js' 'test/**/*.js' 'support/**/*.js'",
     "lint": "eslint lib/**/*.js test/**/*.js"
diff --git a/support/prod.config.js b/support/prod.config.js
new file mode 100644
index 000000000..907f4706c
--- /dev/null
+++ b/support/prod.config.js
@@ -0,0 +1,19 @@
+const config = require("./webpack.config");
+
+module.exports = {
+  ...config,
+  output: {
+    ...config.output,
+    filename: "engine.io.min.js"
+  },
+  mode: "production",
+  module: {
+    rules: [
+      ...config.module.rules,
+      {
+        test: /\.js$/,
+        loader: "webpack-remove-debug"
+      }
+    ]
+  }
+};
diff --git a/support/webpack.config.js b/support/webpack.config.js
index 42d8f7f42..111c8319f 100644
--- a/support/webpack.config.js
+++ b/support/webpack.config.js
@@ -24,7 +24,7 @@ module.exports = {
       }
     })()`
   },
-  mode: "production",
+  mode: "development",
   node: {
     Buffer: false
   },
diff --git a/test/support/public/worker.js b/test/support/public/worker.js
index 91ee6a008..7248a0fd1 100644
--- a/test/support/public/worker.js
+++ b/test/support/public/worker.js
@@ -1,6 +1,6 @@
 /* global importScripts,eio,postMessage */
 
-importScripts("/test/support/engine.io.js");
+importScripts("/test/support/engine.io.min.js");
 
 var socket = new eio.Socket();
 
diff --git a/test/support/server.js b/test/support/server.js
index cf75591ad..3d42afe5b 100644
--- a/test/support/server.js
+++ b/test/support/server.js
@@ -8,7 +8,7 @@ var server = require("engine.io").attach(http, { pingInterval: 500 });
 var webpack = require("webpack");
 const path = require("path");
 
-var webpackConfig = require("../../support/webpack.config.js");
+var webpackConfig = require("../../support/prod.config.js");
 
 webpackConfig.output.path = path.resolve(__dirname, "public");