diff --git a/appcast.xml b/appcast.xml
index d894b3d..fb87a81 100644
--- a/appcast.xml
+++ b/appcast.xml
@@ -6,18 +6,18 @@
         <description>Most recent changes with links to updates.</description>
 
         <item>
-            <title>CotEditor 5.0.7</title>
-            <pubDate>Sun, 22 Dec 2024 10:00:00 +0900</pubDate>
+            <title>CotEditor 5.0.8</title>
+            <pubDate>Sun, 19 Jan 2025 09:00:00 +0900</pubDate>
             
-            <sparkle:version>690</sparkle:version>
-            <sparkle:shortVersionString>5.0.7</sparkle:shortVersionString>
+            <sparkle:version>692</sparkle:version>
+            <sparkle:shortVersionString>5.0.8</sparkle:shortVersionString>
             <sparkle:minimumSystemVersion>14.0</sparkle:minimumSystemVersion>
-            <sparkle:releaseNotesLink xml:lang="en">https://coteditor.com/releasenotes/5.0.7.en.html</sparkle:releaseNotesLink>
-            <sparkle:releaseNotesLink xml:lang="ja">https://coteditor.com/releasenotes/5.0.7.ja.html</sparkle:releaseNotesLink>
-            <enclosure url="https://github.com/coteditor/CotEditor/releases/download/5.0.7/CotEditor_5.0.7.dmg"
-                       length="18319439"
+            <sparkle:releaseNotesLink xml:lang="en">https://coteditor.com/releasenotes/5.0.8.en.html</sparkle:releaseNotesLink>
+            <sparkle:releaseNotesLink xml:lang="ja">https://coteditor.com/releasenotes/5.0.8.ja.html</sparkle:releaseNotesLink>
+            <enclosure url="https://github.com/coteditor/CotEditor/releases/download/5.0.8/CotEditor_5.0.8.dmg"
+                       length="16568345"
                        type="application/octet-stream"
-                        sparkle:edSignature="o06rctswJs6gSeMROwQJLDMIa+RzVBUvKaOm/zg4vTvIDm2mPp/gpKXEH/UgYwV/G4FRlNAZsk+8OdAalWDwCw=="/>
+                        sparkle:edSignature="K51wcGBXsvc7Fm8jmrBOe/ZYorq1jhOEk3VT+qctVMXg4mA7Sd0Ro4AYsq++GMYLxUu6L4QNtOxOLmC45mGDDw=="/>
         </item>
 
         <item>
diff --git a/archives.html b/archives.html
index 9f29956..ca26ddd 100644
--- a/archives.html
+++ b/archives.html
@@ -50,19 +50,19 @@ <h2>CotEditor non-AppStore version</h2>
 
 <p>CotEditor is distributed on the <a href="https://itunes.apple.com/app/coteditor/id1024640650?ls=1" rel="external" title="CotEditor -Mac App Store">Mac App Store</a>. However, there is also a non-AppStore version just for in case.</p>
 
-<a href="https://github.com/coteditor/CotEditor/releases/download/5.0.7/CotEditor_5.0.7.dmg"
-		download="CotEditor_5.0.7.dmg"
-		title="Download | CotEditor_5.0.7.dmg">
+<a href="https://github.com/coteditor/CotEditor/releases/download/5.0.8/CotEditor_5.0.8.dmg"
+		download="CotEditor_5.0.8.dmg"
+		title="Download | CotEditor_5.0.8.dmg">
 		<img src="./img/appicon/64@2x.png" width="64" alt=""/>
-		CotEditor <span>5.0.7</span>
+		CotEditor <span>5.0.8</span>
 </a>
 <dl>
 	<dt>released on</dt>
-	<dd><time>2024-12-22</time></dd>
+	<dd><time>2025-01-19</time></dd>
 
 	<dt>release notes</dt>
-	<dd><a href="releasenotes/5.0.7.en" hreflang="en">en</a></dd>
-	<dd><a href="releasenotes/5.0.7.ja" hreflang="ja">ja</a></dd>
+	<dd><a href="releasenotes/5.0.8.en" hreflang="en">en</a></dd>
+	<dd><a href="releasenotes/5.0.8.ja" hreflang="ja">ja</a></dd>
 
 	<dt>requirements</dt>
 	<dd>macOS 14 or later</dd>
@@ -261,7 +261,7 @@ <h2>Additional Themes</h2>
 
 
 <footer>
-	<p class="copyright">© 2014-2024 CotEditor Project</p>
+	<p class="copyright">© 2014-2025 CotEditor Project</p>
 </footer>
 </body>
 </html>
diff --git a/archives.ja.html b/archives.ja.html
index 4f9d742..7e9b001 100644
--- a/archives.ja.html
+++ b/archives.ja.html
@@ -50,19 +50,19 @@ <h2>CotEditor non-AppStore版</h2>
 
 <p>CotEditorは<a href="https://itunes.apple.com/app/coteditor/id1024640650?ls=1" rel="external" title="CotEditor -Mac App Store">Mac App Store</a>で配布されていますが、直接ダウンロードできるnon-AppStore版も用意されています。</p>
 
-<a href="https://github.com/coteditor/CotEditor/releases/download/5.0.7/CotEditor_5.0.7.dmg"
-		download="CotEditor_5.0.7.dmg"
-		title="Download | CotEditor_5.0.7.dmg">
+<a href="https://github.com/coteditor/CotEditor/releases/download/5.0.8/CotEditor_5.0.8.dmg"
+		download="CotEditor_5.0.8.dmg"
+		title="Download | CotEditor_5.0.8.dmg">
 		<img src="./img/appicon/64@2x.png" width="64" alt=""/>
-		CotEditor <span>5.0.7</span>
+		CotEditor <span>5.0.8</span>
 </a>
 <dl>
 	<dt>リリース日</dt>
-	<dd><time>2024-12-22</time></dd>
+	<dd><time>2025-01-19</time></dd>
 
 	<dt>リリースノート</dt>
-	<dd><a href="releasenotes/5.0.7.en" hreflang="en">英語</a></dd>
-	<dd><a href="releasenotes/5.0.7.ja" hreflang="ja">日本語</a></dd>
+	<dd><a href="releasenotes/5.0.8.en" hreflang="en">英語</a></dd>
+	<dd><a href="releasenotes/5.0.8.ja" hreflang="ja">日本語</a></dd>
 
 	<dt>システム条件</dt>
 	<dd>macOS 14以降</dd>
@@ -265,7 +265,7 @@ <h2>追加テーマ</h2>
 
 
 <footer>
-	<p class="copyright">© 2014-2024 CotEditor Project</p>
+	<p class="copyright">© 2014-2025 CotEditor Project</p>
 </footer>
 </body>
 </html>
diff --git a/archives.tr.html b/archives.tr.html
index a3066d3..5df2ab6 100644
--- a/archives.tr.html
+++ b/archives.tr.html
@@ -50,19 +50,19 @@ <h2>CotEditor AppStore olmayan sürüm</h2>
 
 <p>CotEditor, <a href="https://itunes.apple.com/app/coteditor/id1024640650?ls=1" rel="external" title="CotEditor -Mac App Store">Mac App Store</a>'da dağıtılır. Ancak, AppStore dışı dağıtılan bir sürüm de mevcuttur.</p>
 
-<a href="https://github.com/coteditor/CotEditor/releases/download/5.0.7/CotEditor_5.0.7.dmg"
-		download="CotEditor_5.0.7.dmg"
-		title="İndir | CotEditor_5.0.7.dmg">
+<a href="https://github.com/coteditor/CotEditor/releases/download/5.0.8/CotEditor_5.0.8.dmg"
+		download="CotEditor_5.0.8.dmg"
+		title="İndir | CotEditor_5.0.8.dmg">
 		<img src="./img/appicon/64@2x.png" width="64" alt=""/>
-		CotEditor <span>5.0.7</span>
+		CotEditor <span>5.0.8</span>
 </a>
 <dl>
 	<dt>yayımlama tarihi</dt>
-	<dd><time>2024-12-22</time></dd>
+	<dd><time>2025-01-19</time></dd>
 
 	<dt>sürüm notları</dt>
-	<dd><a href="releasenotes/5.0.7.en" hreflang="en">en</a></dd>
-	<dd><a href="releasenotes/5.0.7.ja" hreflang="ja">ja</a></dd>
+	<dd><a href="releasenotes/5.0.8.en" hreflang="en">en</a></dd>
+	<dd><a href="releasenotes/5.0.8.ja" hreflang="ja">ja</a></dd>
 
 	<dt>gereksinimler</dt>
 	<dd>macOS 14 veya sonrası</dd>
@@ -261,7 +261,7 @@ <h2>Ek Temalar</h2>
 
 
 <footer>
-	<p class="copyright">© 2014-2024 CotEditor Project</p>
+	<p class="copyright">© 2014-2025 CotEditor Project</p>
 </footer>
 </body>
 </html>
diff --git a/releasenotes/5.0.8.en.html b/releasenotes/5.0.8.en.html
new file mode 100644
index 0000000..a3ccc56
--- /dev/null
+++ b/releasenotes/5.0.8.en.html
@@ -0,0 +1,69 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head prefix="og: http://ogp.me/ns#">
+	<meta charset="UTF-8"/>
+
+	<title>What's new on CotEditor 5.0.8 - CotEditor</title>
+
+	<meta name="description"  content="What's new on CotEditor 5.0.8"/>
+
+	<meta property="og:type"         content="article"/>
+	<meta property="og:url"          content="https://coteditor.com/releasenotes/5.0.8.en"/>
+	<meta property="og:title"        content="CotEditor"/>
+	<meta property="og:description"  content="What's new on CotEditor 5.0.8"/>
+	<meta property="og:image"        content="https://coteditor.com/img/appicon/512@2x.png"/>
+	<meta property="og:site_name"    content="CotEditor"/>
+	<meta property="og:locale"       content="en_US"/>
+	<meta property="twitter:card"    content="summary"/>
+	<meta property="twitter:creator" content="@CotEditor"/>
+
+	<link rel="shortcut icon" href="/favicon.png"    type="image/png" sizes="16x16"/>
+	<link rel="shortcut icon" href="/favicon@2x.png" type="image/png" sizes="32x32"/>
+	<link rel="alternate"     href="5.0.8.ja" hreflang="ja"/>
+	<link rel="stylesheet"    href="../css/common.css"/>
+	<link rel="stylesheet"    href="../css/releasenotes.css"/>
+</head>
+
+<body>
+<header>
+	<a href="/">CotEditor</a>
+</header>
+
+<main>
+
+<article>
+	<header>
+		<h1>CotEditor 5.0.8</h1>
+		<p>release: <time>2025-01-19</time></p>
+	</header>
+
+
+	<section>
+		<h2>Improvements</h2>
+
+		<ul>
+			<li>Add missing localization of Unicode block names.</li>
+		</ul>
+	</section>
+
+
+	<section>
+		<h2>Fixes</h2>
+
+		<ul>
+			<li>Fix an issue where the text fields in the syntax editor could restore the contents after the input under certain conditions.</li>
+			<li>Fix a potential crash that rarely occurs when interacting with the Quick Action bar.</li>
+		</ul>
+	</section>
+
+<p><a href="5.0.7.en">previous release notes</a></p>
+</article>
+</main>
+
+
+<footer>
+	<p class="copyright">© 2025 CotEditor Project</p>
+</footer>
+</body>
+</html>
diff --git a/releasenotes/5.0.8.ja.html b/releasenotes/5.0.8.ja.html
new file mode 100644
index 0000000..775e63d
--- /dev/null
+++ b/releasenotes/5.0.8.ja.html
@@ -0,0 +1,69 @@
+<!DOCTYPE html>
+<html lang="ja">
+
+<head prefix="og: http://ogp.me/ns#">
+	<meta charset="UTF-8"/>
+
+	<title>CotEditor 5.0.8の変更点 - CotEditor</title>
+
+	<meta name="description"  content="CotEditor 5.0.8の変更点"/>
+
+	<meta property="og:type"         content="article"/>
+	<meta property="og:url"          content="https://coteditor.com/releasenotes/5.0.8.ja"/>
+	<meta property="og:title"        content="CotEditor"/>
+	<meta property="og:description"  content="CotEditor 5.0.8の変更点"/>
+	<meta property="og:image"        content="https://coteditor.com/img/appicon/512@2x.png"/>
+	<meta property="og:site_name"    content="CotEditor"/>
+	<meta property="og:locale"       content="ja_JP"/>
+	<meta property="twitter:card"    content="summary"/>
+	<meta property="twitter:creator" content="@CotEditor"/>
+
+	<link rel="shortcut icon" href="/favicon.png"    type="image/png" sizes="16x16"/>
+	<link rel="shortcut icon" href="/favicon@2x.png" type="image/png" sizes="32x32"/>
+	<link rel="alternate"     href="5.0.8.en" hreflang="en"/>
+	<link rel="stylesheet"    href="../css/common.css"/>
+	<link rel="stylesheet"    href="../css/releasenotes.css"/>
+</head>
+
+<body>
+<header>
+	<a href="/">CotEditor</a>
+</header>
+
+<main>
+
+<article>
+	<header>
+		<h1>CotEditor 5.0.8</h1>
+		<p>リリース: <time>2025-01-19</time></p>
+	</header>
+
+
+	<section>
+		<h2>改良</h2>
+
+		<ul>
+			<li>ローカライズされていなかったUnicodeブロック名のローカリゼーションを追加</li>
+		</ul>
+	</section>
+
+
+	<section>
+		<h2>修正</h2>
+
+		<ul>
+			<li>シンタックスエディタのテキストフィールドに入力したとき、特定の条件下で内容が復元されることがあった不具合を修正</li>
+			<li>クイックアクションバーを操作するとまれにクラッシュする可能性があった不具合を修正</li>
+		</ul>
+	</section>
+
+	<p><a href="5.0.7.ja">以前のリリースノート</a></p>
+</article>
+</main>
+
+
+<footer>
+	<p class="copyright">© 2025 CotEditor Project</p>
+</footer>
+</body>
+</html>