diff --git a/.github/renovate.json5 b/.github/renovate.json5
index 21f4b3323637d..acf2787087346 100644
--- a/.github/renovate.json5
+++ b/.github/renovate.json5
@@ -26,15 +26,6 @@
 		// Monorepo packages are excluded in renovate-config.js, where we can read
 		// the list of them in code.
 
-		// Not a real package.
-		{
-			matchDatasources: [ 'packagist' ],
-			matchPackageNames: [
-				'wordpress/classic-editor-plugin',
-			],
-			enabled: false,
-		},
-
 		// Widen PHP dev deps to maintain support for old PHP versions we still support.
 		// When we drop an old PHP version we'll manually go through and narrow any ranges.
 		// (non-dev deps are handled in renovate-config.js where we can read the correct value for `constraints.php`)
@@ -115,7 +106,29 @@
 			depNameTemplate: 'renovate',
 			packageNameTemplate: 'ghcr.io/renovatebot/renovate',
 		},
+
+		// wpcomsh's wordpress/classic-editor-plugin plugin.
+		{
+			customType: 'regex',
+			fileMatch: [ '^projects/plugins/wpcomsh/composer\\.json$' ],
+			matchStrings: [
+				'"name": "wordpress/classic-editor-plugin",\\s+"version": "(?<currentValue>[0-9.]+)",',
+				'"url": "https://downloads\\.wordpress\\.org/plugin/classic-editor\\.(?<currentValue>[0-9.]+)\\.zip",',
+				'"url": "https://plugins\\.svn\\.wordpress\\.org/classic-editor/",\s+"type": "svn",\s+"reference": "tags/(?<currentValue>[0-9.]+)/"',
+			],
+			depNameTemplate: 'wordpress/classic-editor-plugin',
+			packageNameTemplate: 'wordpress/classic-editor-plugin',
+			datasourceTemplate: 'custom.wordpress/classic-editor-plugin',
+		},
 	],
+	customDatasources: {
+		'custom.wordpress/classic-editor-plugin': {
+			defaultRegistryUrlTemplate: 'https://api.wordpress.org/plugins/info/1.0/classic-editor.json',
+			transformTemplates: [
+				'{ "releases": $each( versions, function($v, $k) { $match( $k, /^[0-9.]+$/ ) ? { "version": $k } } ) }',
+			],
+		},
+	},
 
 	lockFileMaintenance: {
 		enabled: true,