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‎CHANGELOG.md‎
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‎CHANGELOG.md‎
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‎src/DependencyInjection/MonologExtension.php‎
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‎src/DependencyInjection/MonologExtension.php‎
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@@ -1,5 +1,9 @@
 ## Unreleased
 
+## unreleased
+
+* Fix `rollbar` handler to use `RollbarLogger` with Monolog 2+
+
 ## 3.11.0 (2025-11-27)
 
 * Reorganize files to match the "Reusable Bundles" structure
 
@@ -930,7 +930,7 @@ private function buildHandler(ContainerBuilder $container, $name, array $handler
                 } else {
                     $config = $handler['config'] ?: [];
                     $config['access_token'] = $handler['token'];
-                    $rollbar = new Definition('RollbarNotifier', [
+                    $rollbar = new Definition(Logger::API === 1 ? 'RollbarNotifier' : 'Rollbar\RollbarLogger', [
                         $config,
                     ]);
                     $rollbarId = 'monolog.rollbar.notifier.'.sha1(json_encode($config));