diff --git a/NebulaAuth/update.xml b/NebulaAuth/update.xml
index 8660c3f..0c53f7e 100644
--- a/NebulaAuth/update.xml
+++ b/NebulaAuth/update.xml
@@ -1,7 +1,8 @@
 <?xml version="1.0" encoding="UTF-8"?>
- <item>
-  <version>1.8.2</version>
-  <url>https://github.com/achiez/NebulaAuth-Steam-Desktop-Authenticator-by-Achies/releases/download/1.8.2/NebulaAuth.1.8.2.zip</url>
-  <changelog>https://achiez.github.io/NebulaAuth-Steam-Desktop-Authenticator-by-Achies/changelog/1.8.2.html</changelog>
+<item>
+  <version>1.8.3</version>
+  <url>https://github.com/achiez/NebulaAuth-Steam-Desktop-Authenticator-by-Achies/releases/download/1.8.3/NebulaAuth.1.8.3.zip</url>
+  <changelog>https://achiez.github.io/NebulaAuth-Steam-Desktop-Authenticator-by-Achies/changelog/1.8.3.html</changelog>
   <mandatory>false</mandatory>
+  <checksum algorithm="SHA256">bdd8150e272e9adc360f6ef804e6cc52e11010e0ec9b359a9a13a68dee3b0368</checksum>
 </item>
diff --git a/changelog/1.8.3.html b/changelog/1.8.3.html
new file mode 100644
index 0000000..cd249ba
--- /dev/null
+++ b/changelog/1.8.3.html
@@ -0,0 +1,27 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="UTF-8">
+<title>Changelog</title>
+<style>
+body { font-family: Segoe UI, sans-serif; background:#eeeeee; padding:20px; }
+.change { background:white; padding:25px; border-radius:10px; }
+li { margin-bottom:6px; }
+</style>
+</head>
+<body>
+<div class="change">
+<ul>
+<li><b>NEW:</b> Introduced a redesigned update system with a custom update dialog and integrated changelog viewer <a href="https://github.com/achiez/NebulaAuth-Steam-Desktop-Authenticator-by-Achies/pull/19">details</a></li>
+<li><b>NEW:</b> Added support for importing SDA-encrypted mafiles with automatic manifest detection <a href="https://github.com/achiez/NebulaAuth-Steam-Desktop-Authenticator-by-Achies/pull/17">details</a></li>
+<li><b>NEW:</b> Grouped market confirmations can now be expanded to reveal individual items <a href="https://github.com/achiez/NebulaAuth-Steam-Desktop-Authenticator-by-Achies/pull/18">details</a></li>
+<li><b>SECURITY:</b> Added SHA256 checksum verification for downloaded update packages</li>
+<li><b>IMPROVEMENT:</b> Export feature now trims input automatically to prevent issues caused by invisible characters or extra spaces</li>
+<li><b>IMPROVEMENT:</b> Improved update experience with 'Remind later' and 'Skip version' options</li>
+<li><b>IMPROVEMENT:</b> Added visual update indicator and manual 'Check for updates' action</li>
+<li><b>IMPROVEMENT:</b> Expanded localization support with Spanish, Turkish and Kazakh languages</li>
+<li><b>INFO:</b> Read the full release notes for NebulaAuth 1.8.3 <a href="https://teletype.in/@achies_raw/o-RDwZKZkAU">details</a></li>
+</ul>
+</div>
+</body>
+</html>
