diff --git a/update.xml b/update.xml
new file mode 100644
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--- /dev/null
+++ b/update.xml
@@ -0,0 +1,34 @@
+<!--
+  Joomla Extension Update Server XML
+  See: https://docs.joomla.org/Deploying_an_Update_Server
+
+  This file is the update server manifest for {{EXTENSION_NAME}}.
+  The Joomla installer polls this URL to check for new versions.
+
+  The manifest.xml in this repository must reference this file:
+    <updateservers>
+      <server type="extension" priority="1" name="{{EXTENSION_NAME}}">
+        https://github.com/mokoconsulting-tech/MokoCassiopeia/raw/main/update.xml
+      </server>
+    </updateservers>
+
+  When a new release is made, run `make release` or the release workflow to
+  prepend a new <update> entry to this file automatically.
+-->
+<updates>
+	<update>
+		<name>{{EXTENSION_NAME}}</name>
+		<description>MokoCassiopeia — Moko Consulting Joomla extension</description>
+		<element>{{EXTENSION_ELEMENT}}</element>
+		<type>{{EXTENSION_TYPE}}</type>
+		<version>{{VERSION}}</version>
+		<infourl title="Release Information">https://github.com/mokoconsulting-tech/MokoCassiopeia/releases/tag/{{VERSION}}</infourl>
+		<downloads>
+			<downloadurl type="full" format="zip">{{DOWNLOAD_URL}}</downloadurl>
+		</downloads>
+		<targetplatform name="joomla" version="4\.[0-9]+" />
+		<php_minimum>7.4</php_minimum>
+		<maintainer>Moko Consulting</maintainer>
+		<maintainerurl>{{MAINTAINER_URL}}</maintainerurl>
+	</update>
+</updates>
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