diff --git a/config.json b/config.json
index 1fd5a99b9..c122e9f36 100644
--- a/config.json
+++ b/config.json
@@ -160,5 +160,16 @@
         }
       }
     }
+  },
+  "keys": {
+    "npm": [
+      {
+        "expires": null,
+        "keyid": "SHA256:jl3bwswu80PjjokCgh0o2w5c2U4LhQAE57gj9cz1kzA",
+        "keytype": "ecdsa-sha2-nistp256",
+        "scheme": "ecdsa-sha2-nistp256",
+        "key": "MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAE1Olb3zMAFFxXKHiIkQO5cJ3Yhl5i6UPp+IhuteBJbuHcA5UogKo0EWtlWwW6KSaKoTNEYL7JlCQiVnkhBktUgg=="
+      }
+    ]
   }
-}
+}
\ No newline at end of file
diff --git a/sources/corepackUtils.ts b/sources/corepackUtils.ts
index bf14c3d17..2be5d9ac9 100644
--- a/sources/corepackUtils.ts
+++ b/sources/corepackUtils.ts
@@ -1,4 +1,4 @@
-import {createHash, createVerify, webcrypto}                   from 'crypto';
+import {createHash, createVerify}                              from 'crypto';
 import {once}                                                  from 'events';
 import {FileHandle}                                            from 'fs/promises';
 import fs                                                      from 'fs';
@@ -8,6 +8,8 @@ import path                                                    from 'path';
 import semver                                                  from 'semver';
 import {setTimeout as setTimeoutPromise}                       from 'timers/promises';
 
+import defaultConfig                                           from '../config.json';
+
 import * as engine                                             from './Engine';
 import * as debugUtils                                         from './debugUtils';
 import * as folderUtils                                        from './folderUtils';
@@ -23,8 +25,6 @@ export function getRegistryFromPackageManagerSpec(spec: PackageManagerSpec) {
     : spec.registry;
 }
 
-type NpmSignatureKey = {"expires": null, "keyid": string, "keytype": string, "scheme": string, "key": string};
-
 export async function fetchLatestStableVersion(spec: RegistrySpec): Promise<string> {
   switch (spec.type) {
     case `npm`: {
@@ -244,8 +244,8 @@ export async function installVersion(installTarget: string, locator: Locator, {s
     if (registry.type === `npm` && !process.env.COREPACK_NPM_REGISTRY) {
       if (signatures! == null || integrity! == null)
         ({signatures, integrity} = (await npmRegistryUtils.fetchTarballURLAndSignature(registry.package, version)));
-      const {keys} = await httpUtils.fetchAsJson(new URL(`/-/npm/v1/keys`, process.env.COREPACK_NPM_REGISTRY || npmRegistryUtils.DEFAULT_NPM_REGISTRY_URL));
-      const key: NpmSignatureKey | undefined = keys.find(({keyid}: NpmSignatureKey) => signatures.some(s => s.keyid === keyid));
+      const {npm: keys} = defaultConfig.keys;
+      const key = keys.find(({keyid}) => signatures.some(s => s.keyid === keyid));
       const signature = signatures.find(({keyid}) => keyid === key?.keyid);
       switch (key?.keytype) {
         case `ecdsa-sha2-nistp256`: {
@@ -265,6 +265,7 @@ export async function installVersion(installTarget: string, locator: Locator, {s
 
         default: throw new Error(`Unsupported signature key`, {cause: key});
       }
+      // @ts-expect-error ignore readonly
       build[1] = Buffer.from(integrity.slice(`sha512-`.length), `base64`).toString(`hex`);
     }
   }
diff --git a/sources/types.ts b/sources/types.ts
index 20d66233e..78808c89a 100644
--- a/sources/types.ts
+++ b/sources/types.ts
@@ -96,6 +96,10 @@ export interface Config {
       };
     };
   };
+
+  keys: {
+    [registry: string]: Array<{"expires": null, "keyid": string, "keytype": string, "scheme": string, "key": string}>;
+  };
 }
 
 /**
diff --git a/tests/config.test.ts b/tests/config.test.ts
new file mode 100644
index 000000000..c6a512d04
--- /dev/null
+++ b/tests/config.test.ts
@@ -0,0 +1,14 @@
+import {jest, describe, it, expect} from '@jest/globals';
+
+import defaultConfig                from '../config.json';
+import {DEFAULT_NPM_REGISTRY_URL}   from '../sources/npmRegistryUtils';
+
+jest.mock(`../sources/httpUtils`);
+
+describe(`key store should be up-to-date`, () => {
+  it(`should contain up-to-date npm keys`, async () => {
+    const r = await globalThis.fetch(new URL(`/-/npm/v1/keys`, DEFAULT_NPM_REGISTRY_URL));
+    expect(r.ok).toBe(true);
+    expect(r.json()).resolves.toMatchObject({keys: defaultConfig.keys.npm});
+  });
+});