diff --git a/types/terser-webpack-plugin/index.d.ts b/types/terser-webpack-plugin/index.d.ts
index fabfdd920588ec..e5cf729267bc7a 100644
--- a/types/terser-webpack-plugin/index.d.ts
+++ b/types/terser-webpack-plugin/index.d.ts
@@ -1,9 +1,8 @@
-// Type definitions for terser-webpack-plugin 4.1
+// Type definitions for terser-webpack-plugin 4.2
 // Project: https://github.com/webpack-contrib/terser-webpack-plugin
 // Definitions by: Daniel Schopf <https://github.com/Danscho>
 //                 Piotr Błażejewicz <https://github.com/peterblazejewicz>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
-// TypeScript Version: 3.0
 
 import { Plugin } from 'webpack';
 import { MinifyOptions } from 'terser';
@@ -89,7 +88,7 @@ declare namespace TerserPlugin {
          * By default plugin uses terser package. Useful for using and testing unpublished versions or forks
          * @default undefined
          */
-        minify?: (file: any, sourceMap: any) => MinifyResult;
+        minify?: (file: any, sourceMap: any, minimizerOptions?: MinifyOptions) => MinifyResult;
 
         /**
          * Terser minify {@link https://github.com/terser/terser#minify-options|options}.
diff --git a/types/terser-webpack-plugin/terser-webpack-plugin-tests.ts b/types/terser-webpack-plugin/terser-webpack-plugin-tests.ts
index 42e6ed942d99ae..dbc58c446ff685 100644
--- a/types/terser-webpack-plugin/terser-webpack-plugin-tests.ts
+++ b/types/terser-webpack-plugin/terser-webpack-plugin-tests.ts
@@ -47,7 +47,8 @@ const _ = webpack({
             }),
             // minify
             new TerserPlugin({
-                minify: (file, sourceMap) => {
+                minify: (file, sourceMap, minimizerOptions) => {
+                    minimizerOptions!; // $ExpectType MinifyOptions
                     const results: TerserPlugin.MinifyResult = {
                         code: '',
                         extractedComments: [''],