diff --git a/keyserver/src/cron/cron.js b/keyserver/src/cron/cron.js
index 6540ed0afc..2b83481e33 100644
--- a/keyserver/src/cron/cron.js
+++ b/keyserver/src/cron/cron.js
@@ -6,7 +6,6 @@ import schedule from 'node-schedule';
 import { backupDB } from './backups.js';
 import { createDailyUpdatesThread } from './daily-updates.js';
 import { updateAndReloadGeoipDB } from './update-geoip-db.js';
-import { updateIdentityReservedUsernames } from './update-identity-reserved-usernames.js';
 import { deleteOrphanedActivity } from '../deleters/activity-deleters.js';
 import { deleteExpiredCookies } from '../deleters/cookie-deleters.js';
 import { deleteOrphanedDays } from '../deleters/day-deleters.js';
@@ -93,20 +92,7 @@ if (cluster.isMaster) {
       }
     },
   );
-  schedule.scheduleJob(
-    '0 5 * * *', // every day at 5:00 AM in the keyserver's timezone
-    async () => {
-      try {
-        await updateIdentityReservedUsernames();
-      } catch (e) {
-        console.warn(
-          'encountered error while trying to update reserved usernames on ' +
-            'identity service',
-          e,
-        );
-      }
-    },
-  );
+
   schedule.scheduleJob(
     '0 0 * * *', // every day at midnight in the keyserver's timezone
     async () => {
diff --git a/keyserver/src/cron/update-identity-reserved-usernames.js b/keyserver/src/cron/update-identity-reserved-usernames.js
deleted file mode 100644
index 00b59a7ae8..0000000000
--- a/keyserver/src/cron/update-identity-reserved-usernames.js
+++ /dev/null
@@ -1,31 +0,0 @@
-// @flow
-
-import { getRustAPI } from 'rust-node-addon';
-
-import type { ReservedUsernameMessage } from 'lib/types/crypto-types.js';
-
-import { fetchAllUsernames } from '../fetchers/user-fetchers.js';
-import { addReservedUsernamesStatement } from '../shared/message-statements.js';
-import { fetchOlmAccount } from '../updaters/olm-account-updater.js';
-
-async function updateIdentityReservedUsernames(): Promise<void> {
-  const [usernames, rustAPI, accountInfo] = await Promise.all([
-    fetchAllUsernames(),
-    getRustAPI(),
-    fetchOlmAccount('content'),
-  ]);
-  const issuedAt = new Date().toISOString();
-  const reservedUsernameMessage: ReservedUsernameMessage<
-    $ReadOnlyArray<string>,
-  > = {
-    statement: addReservedUsernamesStatement,
-    payload: usernames,
-    issuedAt,
-  };
-  const stringifiedMessage = JSON.stringify(reservedUsernameMessage);
-  const signature = accountInfo.account.sign(stringifiedMessage);
-
-  await rustAPI.addReservedUsernames(stringifiedMessage, signature);
-}
-
-export { updateIdentityReservedUsernames };