diff --git a/custom-typings.d.ts b/custom-typings.d.ts
new file mode 100644
index 000000000000..0674a12026b3
--- /dev/null
+++ b/custom-typings.d.ts
@@ -0,0 +1,28 @@
+interface IWebpackDevServerConfigurationOptions {
+  contentBase?: string;
+  hot?: boolean;
+  historyApiFallback?: boolean;
+  compress?: boolean;
+  proxy?: {[key: string] : string};
+  staticOptions?: any;
+  quiet?: boolean;
+  noInfo?: boolean;
+  lazy?: boolean;
+  filename?: string;
+  watchOptions?: {
+    aggregateTimeout?: number;
+    poll?: number;
+  };
+  publicPath?: string;
+  headers?: { [key:string]: string };
+  stats?: { colors: boolean; };
+  inline: boolean;
+}
+
+interface WebpackProgressPluginOutputOptions {
+  colors?: boolean;
+  chunks?: boolean;
+  modules?: boolean;
+  reasons?: boolean;
+  chunkModules?: boolean;
+}