diff --git a/src/utils/note.test.ts b/src/utils/note.test.ts
index 0c9c6bf8..67f802c6 100644
--- a/src/utils/note.test.ts
+++ b/src/utils/note.test.ts
@@ -10,6 +10,27 @@ Deno.test('parseNoteContent', () => {
   assertEquals(firstUrl, undefined);
 });
 
+Deno.test('parseNoteContent handles apostrophes', () => {
+  const { html } = parseNoteContent(
+    `did you see nostr:nprofile1qqsqgc0uhmxycvm5gwvn944c7yfxnnxm0nyh8tt62zhrvtd3xkj8fhgprdmhxue69uhkwmr9v9ek7mnpw3hhytnyv4mz7un9d3shjqgcwaehxw309ahx7umywf5hvefwv9c8qtmjv4kxz7gpzemhxue69uhhyetvv9ujumt0wd68ytnsw43z7s3al0v's speech?`,
+    [{
+      id: '0461fcbecc4c3374439932d6b8f11269ccdb7cc973ad7a50ae362db135a474dd',
+      username: 'alex',
+      acct: 'alex@gleasonator.dev',
+      url: 'https://gleasonator.dev/@alex',
+    }],
+  );
+  assertEquals(
+    html,
+    `did you see <span class="h-card"><a class="u-url mention" href="https://gleasonator.dev/@alex" rel="ugc">@<span>alex@gleasonator.dev</span></a></span>&apos;s speech?`,
+  );
+});
+
+Deno.test("parseNoteContent doesn't parse invalid nostr URIs", () => {
+  const { html } = parseNoteContent(`nip19 has URIs like nostr:npub and nostr:nevent, etc.`, []);
+  assertEquals(html, 'nip19 has URIs like nostr:npub and nostr:nevent, etc.');
+});
+
 Deno.test('getMediaLinks', () => {
   const links = [
     { href: 'https://example.com/image.png' },
diff --git a/src/utils/note.ts b/src/utils/note.ts
index aba3d041..da5197d5 100644
--- a/src/utils/note.ts
+++ b/src/utils/note.ts
@@ -1,10 +1,11 @@
 import 'linkify-plugin-hashtag';
 import linkifyStr from 'linkify-string';
 import linkify from 'linkifyjs';
-import { nip19, nip21, nip27 } from 'nostr-tools';
+import { nip19, nip27 } from 'nostr-tools';
 
 import { Conf } from '@/config.ts';
 import { MastodonMention } from '@/entities/MastodonMention.ts';
+import { html } from '@/utils/html.ts';
 import { getUrlMediaType, isPermittedMediaType } from '@/utils/media.ts';
 
 linkify.registerCustomProtocol('nostr', true);
@@ -23,29 +24,33 @@ interface ParsedNoteContent {
 function parseNoteContent(content: string, mentions: MastodonMention[]): ParsedNoteContent {
   const links = linkify.find(content).filter(isLinkURL);
   const firstUrl = links.find(isNonMediaLink)?.href;
-  const html = linkifyStr(content, {
+
+  const result = linkifyStr(content, {
     render: {
       hashtag: ({ content }) => {
         const tag = content.replace(/^#/, '');
         const href = Conf.local(`/tags/${tag}`);
-        return `<a class=\"mention hashtag\" href=\"${href}\" rel=\"tag\"><span>#</span>${tag}</a>`;
+        return html`<a class=\"mention hashtag\" href=\"${href}\" rel=\"tag\"><span>#</span>${tag}</a>`;
       },
       url: ({ attributes, content }) => {
-        const extra = content.slice(69)
-        content = content.slice(0,69)
         try {
-          const { decoded } = nip21.parse(content);
-          const pubkey = getDecodedPubkey(decoded);
-          if (pubkey) {
-            const mention = mentions.find((m) => m.id === pubkey);
-            const npub = nip19.npubEncode(pubkey);
-            const acct = mention?.acct ?? npub;
-            const name = mention?.acct ?? npub.substring(0, 8);
-            const href = mention?.url ?? Conf.local(`/@${acct}`);
-            return `<span class="h-card"><a class="u-url mention" href="${href}" rel="ugc">@<span>${name}</span></a></span>${extra}`;
-          } else {
-            return '';
+          const { pathname } = new URL(content);
+          const match = pathname.match(new RegExp(`^${nip19.BECH32_REGEX.source}`));
+          if (match) {
+            const bech32 = match[0];
+            const extra = pathname.slice(bech32.length);
+            const decoded = nip19.decode(bech32);
+            const pubkey = getDecodedPubkey(decoded);
+            if (pubkey) {
+              const mention = mentions.find((m) => m.id === pubkey);
+              const npub = nip19.npubEncode(pubkey);
+              const acct = mention?.acct ?? npub;
+              const name = mention?.acct ?? npub.substring(0, 8);
+              const href = mention?.url ?? Conf.local(`/@${acct}`);
+              return html`<span class="h-card"><a class="u-url mention" href="${href}" rel="ugc">@<span>${name}</span></a></span>${extra}`;
+            }
           }
+          return content;
         } catch {
           const attr = Object.entries(attributes)
             .map(([name, value]) => `${name}="${value}"`)
@@ -58,7 +63,7 @@ function parseNoteContent(content: string, mentions: MastodonMention[]): ParsedN
   }).replace(/\n+$/, '');
 
   return {
-    html,
+    html: result,
     links,
     firstUrl,
   };