diff --git a/src/api/accounts.ts b/src/api/accounts.ts
index 1e7406d6..395b35aa 100644
--- a/src/api/accounts.ts
+++ b/src/api/accounts.ts
@@ -17,11 +17,7 @@ const credentialsController: AppController = async (c) => {
 };
 
 const accountController: AppController = async (c) => {
-  const pubkey = c.req.param('id');
-
-  if (!isNostrId(pubkey)) {
-    return c.json({ error: 'Invalid account ID.' }, 422);
-  }
+  const pubkey = c.req.param('pubkey');
 
   const event = await getAuthor(pubkey);
   if (event) {
@@ -72,4 +68,4 @@ const accountSearchController: AppController = async (c) => {
   return c.json([]);
 };
 
-export { accountController, accountSearchController, accountLookupController, credentialsController };
+export { accountController, accountLookupController, accountSearchController, credentialsController };
diff --git a/src/app.ts b/src/app.ts
index c1d5091e..8d4b0bde 100644
--- a/src/app.ts
+++ b/src/app.ts
@@ -1,6 +1,11 @@
 import { type Context, cors, type Handler, Hono, type HonoEnv, type MiddlewareHandler } from '@/deps.ts';
 
-import { accountController, accountLookupController, accountSearchController, credentialsController } from './api/accounts.ts';
+import {
+  accountController,
+  accountLookupController,
+  accountSearchController,
+  credentialsController,
+} from './api/accounts.ts';
 import { appCredentialsController, createAppController } from './api/apps.ts';
 import { emptyArrayController, emptyObjectController } from './api/fallback.ts';
 import homeController from './api/home.ts';
@@ -35,7 +40,7 @@ app.post('/oauth/revoke', emptyObjectController);
 app.get('/api/v1/accounts/verify_credentials', requireAuth, credentialsController);
 app.get('/api/v1/accounts/search', accountSearchController);
 app.get('/api/v1/accounts/lookup', accountLookupController);
-app.get('/api/v1/accounts/:id', accountController);
+app.get('/api/v1/accounts/:pubkey{[0-9a-f]{64}}', accountController);
 
 app.post('/api/v1/statuses', requireAuth, createStatusController);