diff --git a/keyserver/src/utils/ens-cache.js b/keyserver/src/utils/ens-cache.js
index 7cfb9b177..c6a4dbfbc 100644
--- a/keyserver/src/utils/ens-cache.js
+++ b/keyserver/src/utils/ens-cache.js
@@ -1,29 +1,31 @@
 // @flow
 
 import { ethers } from 'ethers';
 
 import { getCommConfig } from 'lib/utils/comm-config.js';
 import { ENSCache } from 'lib/utils/ens-cache.js';
 import {
   getENSNames as baseGetENSNames,
   type GetENSNames,
 } from 'lib/utils/ens-helpers.js';
 
 type AlchemyConfig = { +key: string };
+type BaseUserInfo = { +username?: ?string, ... };
 
 let getENSNames: ?GetENSNames;
 async function initENSCache() {
   const alchemySecret = await getCommConfig<AlchemyConfig>({
     folder: 'secrets',
     name: 'alchemy',
   });
   const alchemyKey = alchemySecret?.key;
   if (!alchemyKey) {
     return;
   }
   const provider = new ethers.providers.AlchemyProvider('mainnet', alchemyKey);
   const ensCache = new ENSCache(provider);
-  getENSNames = baseGetENSNames.bind(null, ensCache);
+  getENSNames = <T: ?BaseUserInfo>(users: $ReadOnlyArray<T>): Promise<T[]> =>
+    baseGetENSNames(ensCache, users);
 }
 
 export { initENSCache, getENSNames };