diff --git a/packages/plugin-protocol-http/MIGRATION.md b/packages/plugin-protocol-http/MIGRATION.md
index 0a80cac..74db275 100644
--- a/packages/plugin-protocol-http/MIGRATION.md
+++ b/packages/plugin-protocol-http/MIGRATION.md
@@ -43,6 +43,30 @@ Documentation links:
 
 [Agent parameters](https://undici.nodejs.org/#/docs/api/Client?id=parameter-clientoptions).
 
+### Headers interface
+
+Previously, node-fetch shipped with a [custom implementation](https://github.com/node-fetch/node-fetch/blob/v2.7.0/src/headers.js) of the `Headers` interface, which included several non-standard, spec-incompatible methods.
+
+These methods are no longer supported, as the library now relies on the native `Headers` interface.
+
+### Headers with the same name
+
+The behavior for combining multiple headers with the same name has changed.
+
+`node-fetch` returned an array of values.
+
+The native Headers interface returns a single string, with values joined by `, `.
+
+As a result, header values are always of type `string` now.
+
+### Undici version
+
+The library now explicitly uses fetch from undici.
+
+undici has been moved to `peerDependencies`, so you must install it yourself when using `tinkoff/request`.
+
+Choose an undici version compatible with your Node.js runtime (check `engine` field in package.json of required undici version).
+
 ### Jest
 
 In jest-environment-jsdom there is no fetch. Use jsdom patching with undici’s fetch, as it is the most spec-compatible:
diff --git a/packages/plugin-protocol-http/package.json b/packages/plugin-protocol-http/package.json
index a7c0d0f..c515d19 100644
--- a/packages/plugin-protocol-http/package.json
+++ b/packages/plugin-protocol-http/package.json
@@ -37,10 +37,11 @@
   },
   "devDependencies": {
     "@types/node": "^18.0.0",
-    "undici": "^5.0.0"
+    "undici": "^7.16.0"
   },
   "peerDependencies": {
-    "@tinkoff/request-core": "0.x"
+    "@tinkoff/request-core": "0.x",
+    "undici": ">=6"
   },
   "module": "lib/index.es.js"
 }
diff --git a/packages/plugin-protocol-http/src/fetch.ts b/packages/plugin-protocol-http/src/fetch.ts
index 23be0d1..9940fda 100644
--- a/packages/plugin-protocol-http/src/fetch.ts
+++ b/packages/plugin-protocol-http/src/fetch.ts
@@ -1,7 +1,7 @@
-import type { RequestInit, RequestInfo, fetch as undiciFetch } from "undici";
+import { RequestInit, RequestInfo, fetch as undiciFetch } from 'undici';
 
 const fetch = (input: RequestInfo, init?: RequestInit) => {
-    return (<typeof undiciFetch>globalThis.fetch)(input, init);
+    return undiciFetch(input, init);
 };
 
 const { Headers, Request, Response } = globalThis;
diff --git a/yarn.lock b/yarn.lock
index 87f9cfb..b41308d 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1513,11 +1513,6 @@
   resolved "https://registry.yarnpkg.com/@bcoe/v8-coverage/-/v8-coverage-0.2.3.tgz#75a2e8b51cb758a7553d6804a5932d7aace75c39"
   integrity sha512-0hYQ8SB4Db5zvZB4axdMHGwEaQjkZzFjQiN9LVYvIFB2nSUHW9tYpxWriPrWDASIxiaXax83REcLxuSdnGPZtw==
 
-"@fastify/busboy@^2.0.0":
-  version "2.1.1"
-  resolved "https://registry.yarnpkg.com/@fastify/busboy/-/busboy-2.1.1.tgz#b9da6a878a371829a0502c9b6c1c143ef6663f4d"
-  integrity sha512-vBZP4NlzfOlerQTnba4aqZoMhE/a9HY7HRqoOPaETQcSQuWEIyZMHGfVu6w9wGtGK5fED5qRs2DteVCjOH60sA==
-
 "@gar/promisify@^1.1.3":
   version "1.1.3"
   resolved "https://registry.yarnpkg.com/@gar/promisify/-/promisify-1.1.3.tgz#555193ab2e3bb3b6adc3d551c9c030d9e860daf6"
@@ -12922,12 +12917,10 @@ undici-types@~5.26.4:
   resolved "https://registry.yarnpkg.com/undici-types/-/undici-types-5.26.5.tgz#bcd539893d00b56e964fd2657a4866b221a65617"
   integrity sha512-JlCMO+ehdEIKqlFxk6IfVoAUVmgz7cU7zD/h9XZ0qzeosSHmUJVOzSQvvYSYWXkFXC+IfLKSIffhv0sVZup6pA==
 
-undici@^5.0.0:
-  version "5.29.0"
-  resolved "https://registry.yarnpkg.com/undici/-/undici-5.29.0.tgz#419595449ae3f2cdcba3580a2e8903399bd1f5a3"
-  integrity sha512-raqeBD6NQK4SkWhQzeYKd1KmIG6dllBOTt55Rmkt4HtI9mwdWtJljnrXjAFUBLTSN67HWrOIZ3EPF4kjUw80Bg==
-  dependencies:
-    "@fastify/busboy" "^2.0.0"
+undici@^7.16.0:
+  version "7.16.0"
+  resolved "https://registry.yarnpkg.com/undici/-/undici-7.16.0.tgz#cb2a1e957726d458b536e3f076bf51f066901c1a"
+  integrity sha512-QEg3HPMll0o3t2ourKwOeUAZ159Kn9mx5pnzHRQO8+Wixmh88YdZRiIwat0iNzNNXn0yoEtXJqFpyW7eM8BV7g==
 
 unicode-canonical-property-names-ecmascript@^2.0.0:
   version "2.0.0"