diff --git a/lib/modules/datasource/packagist/__snapshots__/index.spec.ts.snap b/lib/modules/datasource/packagist/__snapshots__/index.spec.ts.snap
index 91d2b77bfef576b5d5ebe567c422c224ffe18f88..a091611818827620ed258418f0c4bbe73b5beb54 100644
--- a/lib/modules/datasource/packagist/__snapshots__/index.spec.ts.snap
+++ b/lib/modules/datasource/packagist/__snapshots__/index.spec.ts.snap
@@ -2,7 +2,7 @@
 
 exports[`modules/datasource/packagist/index > getReleases > adds packagist source implicitly 1`] = `
 {
-  "registryUrl": "https://packagist.org",
+  "registryUrl": "https://repo.packagist.org",
   "releases": [
     {
       "gitRef": "v1.0",
@@ -106,7 +106,7 @@ exports[`modules/datasource/packagist/index > getReleases > adds packagist sourc
 
 exports[`modules/datasource/packagist/index > getReleases > processes real versioned data 1`] = `
 {
-  "registryUrl": "https://packagist.org",
+  "registryUrl": "https://repo.packagist.org",
   "releases": [
     {
       "gitRef": "v1.0",
diff --git a/lib/modules/datasource/packagist/index.spec.ts b/lib/modules/datasource/packagist/index.spec.ts
index dd69e46f393f86bd0934758b5e6dfd194010e934..727e2a07091bc7cc24bdacd9f96faa3e1d62a7cb 100644
--- a/lib/modules/datasource/packagist/index.spec.ts
+++ b/lib/modules/datasource/packagist/index.spec.ts
@@ -17,7 +17,7 @@ const beytJson = Fixtures.getJson('1beyt.json');
 const mailchimpJson = Fixtures.getJson('mailchimp-api.json');
 const mailchimpDevJson = Fixtures.getJson('mailchimp-api~dev.json');
 
-const baseUrl = 'https://packagist.org';
+const baseUrl = 'https://repo.packagist.org';
 const datasource = PackagistDatasource.id;
 
 describe('modules/datasource/packagist/index', () => {
@@ -31,7 +31,7 @@ describe('modules/datasource/packagist/index', () => {
         versioning: composerVersioning.id,
         registryUrls: [
           'https://composer.renovatebot.com',
-          'https://packagist.org',
+          'https://repo.packagist.org',
         ],
       };
     });
@@ -476,7 +476,7 @@ describe('modules/datasource/packagist/index', () => {
         .reply(200, mailchimpJson)
         .get('/p2/drewm/mailchimp-api~dev.json')
         .reply(200, mailchimpDevJson);
-      config.registryUrls = ['https://packagist.org'];
+      config.registryUrls = ['https://repo.packagist.org'];
       expect(
         await getPkgReleases({
           ...config,
diff --git a/lib/modules/datasource/packagist/index.ts b/lib/modules/datasource/packagist/index.ts
index 5eedcfb5c7c50b29287333c20b7b9eb7445b7e08..200e8587a9ed4ba89d8af78c64df9423603cddaf 100644
--- a/lib/modules/datasource/packagist/index.ts
+++ b/lib/modules/datasource/packagist/index.ts
@@ -26,7 +26,7 @@ export class PackagistDatasource extends Datasource {
     super(PackagistDatasource.id);
   }
 
-  override readonly defaultRegistryUrls = ['https://packagist.org'];
+  override readonly defaultRegistryUrls = ['https://repo.packagist.org'];
 
   override readonly defaultVersioning = composerVersioning.id;