diff --git a/src/Tasks/UpdatePackageInfoTask.php b/src/Tasks/UpdatePackageInfoTask.php
index a0230d2..33cea9f 100644
--- a/src/Tasks/UpdatePackageInfoTask.php
+++ b/src/Tasks/UpdatePackageInfoTask.php
@@ -217,8 +217,8 @@ public function getPackageInfo($packageList)
     }
 
     /**
-     * Return an array of supported modules as fetched from silverstripe/supported-modules. Outputs a message and returns null
-     * if an error occurs
+     * Return an array of supported modules as fetched from silverstripe/supported-modules.
+     * Outputs a message and returns null if an error occurs
      *
      * @return null|array
      */
@@ -234,8 +234,8 @@ public function getSupportedPackages()
     }
 
     /**
-     * Return an array of module health information as fetched from addons.silverstripe.org. Outputs a message and
-     * returns null if an error occurs
+     * Return an array of module health information as fetched from addons.silverstripe.org.
+     * Outputs a message and returns null if an error occurs
      *
      * @param string[] $moduleNames
      * @return null|array
diff --git a/src/Util/ApiLoader.php b/src/Util/ApiLoader.php
index 17c391a..fda231a 100644
--- a/src/Util/ApiLoader.php
+++ b/src/Util/ApiLoader.php
@@ -75,7 +75,11 @@ public function doRequest($endpoint, callable $callback)
         $responseJson = $this->parseResponseContents($response->getBody()->getContents(), $failureMessage);
 
         if (str_contains($endpoint, 'addons.silverstripe.org')) {
-            Deprecation::notice('3.2.0', 'addons.silverstripe.org is no longer operational. Use packagist instead.', Deprecation::SCOPE_GLOBAL);
+            Deprecation::notice(
+                '3.2.0',
+                'addons.silverstripe.org is no longer operational. Use packagist instead.',
+                Deprecation::SCOPE_GLOBAL
+            );
             if (!isset($responseJson['success']) || !$responseJson['success']) {
                 throw new RuntimeException($failureMessage . 'Response returned unsuccessfully');
             }
diff --git a/src/Util/SupportedAddonsLoader.php b/src/Util/SupportedAddonsLoader.php
index 7ade8cd..a3d11f3 100644
--- a/src/Util/SupportedAddonsLoader.php
+++ b/src/Util/SupportedAddonsLoader.php
@@ -14,9 +14,12 @@ class SupportedAddonsLoader extends ApiLoader
      */
     public function getAddonNames()
     {
-        $endpoint = 'https://raw.githubusercontent.com/silverstripe/supported-modules/5/modules.json';
+        $endpoint = 'https://raw.githubusercontent.com/silverstripe/supported-modules/main/repositories.json';
         return $this->doRequest($endpoint, function ($responseJson) {
-            return array_map(fn(array $item) => $item['composer'], $responseJson);
+            return array_filter(array_map(
+                fn(array $item) => isset($item['majorVersionMapping'][5]) ? $item['packagist'] : null,
+                $responseJson['supportedModules']
+            ));
         });
     }
 
diff --git a/tests/Util/SupportedAddonsLoaderTest.php b/tests/Util/SupportedAddonsLoaderTest.php
index 084d53a..413544f 100644
--- a/tests/Util/SupportedAddonsLoaderTest.php
+++ b/tests/Util/SupportedAddonsLoaderTest.php
@@ -23,7 +23,7 @@ protected function setUp(): void
 
     public function testCallsSupportedAddonsEndpoint()
     {
-        $endpoint = 'https://raw.githubusercontent.com/silverstripe/supported-modules/5/modules.json';
+        $endpoint = 'https://raw.githubusercontent.com/silverstripe/supported-modules/main/repositories.json';
         $this->loader->expects($this->once())
             ->method('doRequest')
             ->with($endpoint, function () {
@@ -42,11 +42,57 @@ public function testCallbackReturnsAddonsFromBody()
 
         $result = $this->loader->getAddonNames();
         $mockResponse = [
-            [
-                'composer' => 'foo/bar'
+            'supportedModules' => [
+                [
+                    'github' => 'some/repo1',
+                    'packagist' => 'foo/bar',
+                    'majorVersionMapping' => [
+                        4 => [4],
+                        5 => [5],
+                    ],
+                ],
+                [
+                    'github' => 'some/repo2',
+                    'packagist' => 'bin/baz',
+                    'majorVersionMapping' => [
+                        5 => [5, 6],
+                    ],
+                ],
+                [
+                    'github' => 'some/repo3',
+                    'packagist' => 'bin/baz2',
+                    'majorVersionMapping' => [
+                        4 => [4],
+                    ],
+                ],
             ],
-            [
-                'composer' => 'bin/baz'
+            'workflow' => [
+                [
+                    'github' => 'some/repo4',
+                    'packagist' => 'bin/baz1',
+                    'majorVersionMapping' => [
+                        4 => [4],
+                        5 => [5],
+                    ],
+                ],
+            ],
+            'tooling' => [
+                [
+                    'github' => 'some/repo5',
+                    'packagist' => 'bin/baz2',
+                    'majorVersionMapping' => [
+                        5 => [5, 6],
+                    ],
+                ],
+            ],
+            'misc' => [
+                [
+                    'github' => 'some/repo6',
+                    'packagist' => 'bin/baz3',
+                    'majorVersionMapping' => [
+                        4 => [4],
+                    ],
+                ],
             ],
         ];