diff --git a/karma.conf.js b/karma.conf.js
index 0e1107e..7367213 100644
--- a/karma.conf.js
+++ b/karma.conf.js
@@ -64,6 +64,7 @@ module.exports = function(config) {
         },
         webpack: {
             devtool: "inline-source-map",
+            mode: "development",
             resolve: {
                 extensions: ['.ts', '.js'],
             },
diff --git a/package.json b/package.json
index 877c8da..0ecdcee 100644
--- a/package.json
+++ b/package.json
@@ -4,38 +4,38 @@
   "description": "Password generator for BIOS",
   "main": "decrypt_bios.js",
   "dependencies": {
-    "@types/long": "^3.0.32",
     "@types/jasmine": "^2.8.3",
-    "gulp-jasmine": "^3.0.0",
-    "typescript": "^2.6.2",
-    "long": "dcodeIO/long.js"
+    "@types/long": "^3.0.32",
+    "gulp-jasmine": "^4.0.0",
+    "long": "github:dcodeIO/long.js"
   },
   "devDependencies": {
-    "clean-webpack-plugin": "^0.1.18",
-    "copy-webpack-plugin": "^4.3.1",
+    "clean-webpack-plugin": "^0.1.19",
+    "copy-webpack-plugin": "^4.5.1",
     "coveralls": "^3.0.0",
     "del": "^3.0.0",
     "gulp": "^3.9.1",
     "gulp-istanbul": "^1.1.3",
     "gulp-sourcemaps": "^2.6.4",
-    "gulp-tslint": "^8.1.2",
-    "gulp-typescript": "^3.2.3",
-    "html-webpack-plugin": "^2.30.1",
+    "gulp-tslint": "^8.1.3",
+    "gulp-typescript": "^4.0.2",
+    "html-webpack-plugin": "^3.2.0",
     "istanbul": "^0.4.5",
-    "karma": "^2.0.0",
+    "karma": "^2.0.2",
     "karma-chrome-launcher": "^2.2.0",
     "karma-firefox-launcher": "^1.1.0",
     "karma-jasmine": "^1.1.1",
     "karma-sauce-launcher": "^1.2.0",
     "karma-sourcemap-loader": "^0.3.7",
-    "karma-webpack": "^2.0.9",
-    "remap-istanbul": "^0.10.1",
-    "ts-loader": "^3.3.1",
-    "tslint": "^5.8.0",
-    "typescript": "^2.6.2",
-    "webpack": "^3.10.0",
+    "karma-webpack": "^3.0.0",
+    "remap-istanbul": "^0.11.0",
+    "ts-loader": "^4.2.0",
+    "tslint": "^5.9.1",
+    "typescript": "^2.8.3",
+    "webpack": "^4.6.0",
+    "webpack-cli": "^2.0.15",
     "webpack-closure-compiler": "^2.1.6",
-    "webpack-dev-server": "^2.11.1"
+    "webpack-dev-server": "^3.1.3"
   },
   "scripts": {
     "test": "gulp test",
diff --git a/webpack.config.js b/webpack.config.js
index d1505eb..96f9753 100644
--- a/webpack.config.js
+++ b/webpack.config.js
@@ -5,6 +5,7 @@ const HtmlWebpackPlugin = require('html-webpack-plugin');
 const CopyWebpackPlugin = require('copy-webpack-plugin');
 const CleanWebpackPlugin = require('clean-webpack-plugin');
 const webpack = require('webpack');
+var webpackMode;
 
 function makeClosureCompiler() {
     const externDir = path.join(__dirname, "externs");
@@ -54,6 +55,9 @@ var plugins = [
 
 if (process.env.PRODUCTION) {
     plugins.push(makeClosureCompiler());
+    webpackMode = "production";
+} else {
+    webpackMode = "development";
 }
 
 
@@ -72,6 +76,7 @@ module.exports = {
     resolve: {
         extensions: ['.ts', '.tsx', '.js']
     },
+    mode: webpackMode,
     module: {
         rules: [
             {