diff --git a/webpack/index.d.ts b/webpack/index.d.ts
index 820e76866b..577b96de2f 100644
--- a/webpack/index.d.ts
+++ b/webpack/index.d.ts
@@ -3,9 +3,6 @@
 // Definitions by: Qubo <https://github.com/tkqubo>, Matt Lewis <https://github.com/mattlewis92>, Benjamin Lim <https://github.com/bumbleblym>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 
-/// <reference types="uglify-js" />
-/// <reference types="tapable" />
-
 import * as UglifyJS from 'uglify-js';
 import * as tapable from 'tapable';
 
@@ -278,14 +275,14 @@ declare namespace webpack {
          *
          * @deprecated Replaced by `mainFields` in webpack 2.
          */
-        packageMains?: (string | string[])[];
+        packageMains?: Array<string | string[]>;
 
         /**
          * Check this field in the package.json for an object. Key-value-pairs are threaded as aliasing according to this spec
          *
          * @deprecated Replaced by `aliasFields` in webpack 2.
          */
-        packageAlias?: (string | string[])[];
+        packageAlias?: Array<string | string[]>;
 
         /**
          * Enable aggressive but unsafe caching for the resolving of a part of your files.
@@ -323,9 +320,7 @@ declare namespace webpack {
         [key: string]: boolean | string;
     }
 
-    interface ExternalsFunctionElement {
-        (context: any, request: any, callback: (error: any, result: any) => void): any;
-    }
+    type ExternalsFunctionElement = (context: any, request: any, callback: (error: any, result: any) => void) => any;
 
     interface WatchOptions {
         /** Delay the rebuilt after the first change. Value is a time in ms. */
@@ -469,7 +464,7 @@ declare namespace webpack {
     type Rule = LoaderRule | UseRule | RulesRule | OneOfRule;
 
     interface Plugin extends tapable.Plugin {
-        apply (thisArg: Webpack, ...args: any[]): void
+        apply(thisArg: Webpack, ...args: any[]): void;
     }
 
     interface Webpack {
@@ -620,7 +615,7 @@ declare namespace webpack {
     }
 
     interface ContextReplacementPluginStatic {
-        new (resourceRegExp: any, newContentResource?: any, newContentRecursive?: any, newContentRegExp?: any): Plugin
+        new (resourceRegExp: any, newContentResource?: any, newContentRecursive?: any, newContentRegExp?: any): Plugin;
     }
 
     interface IgnorePluginStatic {
@@ -666,31 +661,31 @@ declare namespace webpack {
 
     interface SourceMapDevToolPluginOptions {
         // output filename pattern (false/null to append)
-        filename?: string | false | null,
+        filename?: string | false | null;
         // source map comment pattern (false to not append)
-        append?: false | string,
+        append?: false | string;
         // template for the module filename inside the source map
-        moduleFilenameTemplate?: string,
+        moduleFilenameTemplate?: string;
         // fallback used when the moduleFilenameTemplate produces a collision
-        fallbackModuleFilenameTemplate?: string,
+        fallbackModuleFilenameTemplate?: string;
         // test/include/exclude files
-        test?: Condition | Condition[],
-        include?: Condition | Condition[],
-        exclude?: Condition | Condition[]
+        test?: Condition | Condition[];
+        include?: Condition | Condition[];
+        exclude?: Condition | Condition[];
         // whether to include the footer comment with source information
-        noSources?: boolean,
+        noSources?: boolean;
         // the source map sourceRoot ("The URL root from which all sources are relative.")
-        sourceRoot?: string | null,
+        sourceRoot?: string | null;
         // whether to generate per-module source map
-        module?: boolean,
+        module?: boolean;
         // whether to include column information in the source map
-        columns?: boolean,
+        columns?: boolean;
         // whether to preserve line numbers between source and source map
         lineToLine?: boolean | {
-            test?: Condition | Condition[],
-            include?: Condition | Condition[],
-            exclude?: Condition | Condition[]
-        }
+            test?: Condition | Condition[];
+            include?: Condition | Condition[];
+            exclude?: Condition | Condition[];
+        };
     }
 
     interface EvalSourceMapDevToolPluginStatic {
@@ -699,16 +694,16 @@ declare namespace webpack {
     }
 
     interface EvalSourceMapDevToolPluginOptions {
-        append?: false | string,
-        moduleFilenameTemplate?: string,
-        sourceRoot?: string,
-        module?: boolean,
-        columns?: boolean,
+        append?: false | string;
+        moduleFilenameTemplate?: string;
+        sourceRoot?: string;
+        module?: boolean;
+        columns?: boolean;
         lineToLine?: boolean | {
-            test?: Condition | Condition[],
-            include?: Condition | Condition[],
-            exclude?: Condition | Condition[]
-        }
+            test?: Condition | Condition[];
+            include?: Condition | Condition[];
+            exclude?: Condition | Condition[];
+        };
     }
 
     interface HotModuleReplacementPluginStatic {
@@ -740,7 +735,7 @@ declare namespace webpack {
             new (): Plugin;
         }
         interface LimitChunkCountPluginStatic {
-            new (options: any): Plugin
+            new (options: any): Plugin;
         }
         interface MinChunkSizePluginStatic {
             new (options: any): Plugin;
@@ -845,7 +840,7 @@ declare namespace webpack {
             colors?: boolean;
         }
 
-        type CompilerCallback = (err: Error, stats: Stats) => void
+        type CompilerCallback = (err: Error, stats: Stats) => void;
     }
 
     interface PerformanceOptions {