diff --git a/docusaurus.config.js b/docusaurus.config.js
index 689b7704..81151917 100644
--- a/docusaurus.config.js
+++ b/docusaurus.config.js
@@ -534,15 +534,14 @@ const config = {
         darkTheme: prismThemes.dracula,
         additionalLanguages: ['csharp', 'docker', 'gradle', 'java', 'json', 'log', 'properties', 'python', 'scala', 'shell-session', 'sql', 'toml'],
       },
-      announcementBar: {
-        id: 'new_version',
-        content:
-          '<b>Announcing the release of ScalarDB 3.15!🚀 For details on what\'s included in this new version, see the <a target="_self" href="https://scalardb.scalar-labs.com/docs/latest/releases/release-notes">release notes</a>.',
-          // '<b>Announcing the release of ScalarDB X.X!🚀 For details on what\'s included in this new version, see the <a target="_self" rel="noopener noreferrer" href="/docs/latest/releases/release-notes">release notes</a>.<b>',
-        backgroundColor: '#2673BB',
-        textColor: '#FFFFFF',
-        isCloseable: false,
-      },
+      // announcementBar: {
+      //   id: 'new_version',
+      //   content:
+      //     // '<b>Announcing the release of ScalarDB X.X!🚀 For details on what\'s included in this new version, see the <a target="_self" rel="noopener noreferrer" href="/docs/latest/releases/release-notes?utm_source=docs-site&utm_medium=announcementbar">release notes</a>.<b>',
+      //   backgroundColor: '#2673BB',
+      //   textColor: '#FFFFFF',
+      //   isCloseable: false,
+      // },
       zoom: {
         selector: '.markdown :not(em) > img',
         background: {
diff --git a/src/data/notifications.js b/src/data/notifications.js
index cfebf1a1..caf358a8 100644
--- a/src/data/notifications.js
+++ b/src/data/notifications.js
@@ -1,6 +1,17 @@
 // This file contains the notifications data and a function to retrieve it.
 // The notifications are stored in an array of objects, each containing a message in multiple languages and URLs for those messages.
 const notificationsList = [
+  {
+    message: {
+      en: 'Check out the release notes for ScalarDB 3.15.3',
+      ja: 'ScalarDB 3.15.3 のリリースノートをご覧ください'
+    },
+    url: {
+      en: 'releases/release-notes#v3153?utm_source=docs-site&utm_medium=notifications',
+      ja: 'releases/release-notes#v3153?utm_source=docs-site&utm_medium=notifications'
+    },
+    unread: true
+  },
   {
     message: {
       en: 'Discover how to implement vector search capabilities with ScalarDB Cluster',