diff --git a/src/controllers/api/accounts.ts b/src/controllers/api/accounts.ts
index 412fa530..d10509e5 100644
--- a/src/controllers/api/accounts.ts
+++ b/src/controllers/api/accounts.ts
@@ -7,9 +7,9 @@ import { type DittoFilter } from '@/filter.ts';
 import { getAuthor, getFollowedPubkeys, getFollows } from '@/queries.ts';
 import { booleanParamSchema, fileSchema } from '@/schema.ts';
 import { jsonMetaContentSchema } from '@/schemas/nostr.ts';
-import { setTag } from '@/tags.ts';
+import { hasTag, setTag } from '@/tags.ts';
 import { uploadFile } from '@/upload.ts';
-import { isFollowing, lookupAccount, nostrNow } from '@/utils.ts';
+import { lookupAccount, nostrNow } from '@/utils.ts';
 import { paginated, paginationSchema, parseBody, updateListEvent } from '@/utils/web.ts';
 import { createEvent } from '@/utils/web.ts';
 import { renderEventAccounts } from '@/views.ts';
@@ -218,14 +218,10 @@ const followController: AppController = async (c) => {
   const targetPubkey = c.req.param('pubkey');
 
   const source = await getFollows(sourcePubkey);
+  const tag = ['p', targetPubkey];
 
-  if (!source || !isFollowing(source, targetPubkey)) {
-    await updateListEvent(
-      source ?? { kind: 3 },
-      ['p', targetPubkey],
-      setTag,
-      c,
-    );
+  if (!source || !hasTag(source.tags, tag)) {
+    await updateListEvent(source ?? { kind: 3 }, tag, setTag, c);
   }
 
   const relationship = await renderRelationship(sourcePubkey, targetPubkey);
diff --git a/src/utils.ts b/src/utils.ts
index 27c61364..1294e007 100644
--- a/src/utils.ts
+++ b/src/utils.ts
@@ -1,6 +1,5 @@
 import { type Event, type EventTemplate, getEventHash, nip19, z } from '@/deps.ts';
 import { getAuthor } from '@/queries.ts';
-import { hasTag } from '@/tags.ts';
 import { lookupNip05Cached } from '@/utils/nip05.ts';
 import { nostrIdSchema } from '@/schemas/nostr.ts';
 
@@ -96,11 +95,6 @@ const relaySchema = z.string().max(255).startsWith('wss://').url();
 /** Check whether the value is a valid relay URL. */
 const isRelay = (relay: string): relay is `wss://${string}` => relaySchema.safeParse(relay).success;
 
-/** Check whether source is following target. */
-function isFollowing(source: Event<3>, targetPubkey: string): boolean {
-  return hasTag(source.tags, ['p', targetPubkey]);
-}
-
 /** Deduplicate events by ID. */
 function dedupeEvents<K extends number>(events: Event<K>[]): Event<K>[] {
   return [...new Map(events.map((event) => [event.id, event])).values()];
@@ -155,7 +149,6 @@ export {
   eventDateComparator,
   eventMatchesTemplate,
   findTag,
-  isFollowing,
   isNostrId,
   isRelay,
   isURL,
diff --git a/src/views/mastodon/relationships.ts b/src/views/mastodon/relationships.ts
index 91d33ea7..57a17df8 100644
--- a/src/views/mastodon/relationships.ts
+++ b/src/views/mastodon/relationships.ts
@@ -1,5 +1,5 @@
 import { getFollows } from '@/queries.ts';
-import { isFollowing } from '@/utils.ts';
+import { hasTag } from '@/tags.ts';
 
 async function renderRelationship(sourcePubkey: string, targetPubkey: string) {
   const [source, target] = await Promise.all([
@@ -9,10 +9,10 @@ async function renderRelationship(sourcePubkey: string, targetPubkey: string) {
 
   return {
     id: targetPubkey,
-    following: source ? isFollowing(source, targetPubkey) : false,
+    following: source ? hasTag(source.tags, ['p', targetPubkey]) : false,
     showing_reblogs: true,
     notifying: false,
-    followed_by: target ? isFollowing(target, sourcePubkey) : false,
+    followed_by: target ? hasTag(target.tags, ['p', sourcePubkey]) : false,
     blocking: false,
     blocked_by: false,
     muting: false,