diff --git a/lib/index.js b/lib/index.js
index 425b5aad56c..6827c731666 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -11,6 +11,11 @@ const memoize = require("./util/memoize");
 /** @typedef {import("../declarations/WebpackOptions").Entry} Entry */
 /** @typedef {import("../declarations/WebpackOptions").EntryNormalized} EntryNormalized */
 /** @typedef {import("../declarations/WebpackOptions").EntryObject} EntryObject */
+/** @typedef {import("../declarations/WebpackOptions").ExternalItemFunctionData} ExternalItemFunctionData */
+/** @typedef {import("../declarations/WebpackOptions").ExternalItemObjectKnown} ExternalItemObjectKnown */
+/** @typedef {import("../declarations/WebpackOptions").ExternalItemObjectUnknown} ExternalItemObjectUnknown */
+/** @typedef {import("../declarations/WebpackOptions").ExternalItemValue} ExternalItemValue */
+/** @typedef {import("../declarations/WebpackOptions").Externals} Externals */
 /** @typedef {import("../declarations/WebpackOptions").FileCacheOptions} FileCacheOptions */
 /** @typedef {import("../declarations/WebpackOptions").LibraryOptions} LibraryOptions */
 /** @typedef {import("../declarations/WebpackOptions").ModuleOptions} ModuleOptions */
diff --git a/types.d.ts b/types.d.ts
index b1ec17297e7..fb8afe224a1 100644
--- a/types.d.ts
+++ b/types.d.ts
@@ -13190,6 +13190,11 @@ declare namespace exports {
 		Entry,
 		EntryNormalized,
 		EntryObject,
+		ExternalItemFunctionData,
+		ExternalItemObjectKnown,
+		ExternalItemObjectUnknown,
+		ExternalItemValue,
+		Externals,
 		FileCacheOptions,
 		LibraryOptions,
 		ModuleOptions,