diff --git a/CHANGELOG.md b/CHANGELOG.md
index f73ca5d3..7ed1f3d2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,7 +7,7 @@
 * Fixed psr-3 processing being applied to all handlers, only leaf ones are now processing
 * Fixed regression when `app` channel is defined explicitly
 * Fixed handlers marked as nested not being ignored properly from the stack
-* Added configuration support for Redis
+* Added support for Redis configuration
 
 ## 3.3.1 (2018-11-04)
 
diff --git a/DependencyInjection/MonologExtension.php b/DependencyInjection/MonologExtension.php
index 02bfbecd..ab8ca555 100644
--- a/DependencyInjection/MonologExtension.php
+++ b/DependencyInjection/MonologExtension.php
@@ -13,8 +13,6 @@
 
 use Monolog\Processor\ProcessorInterface;
 use Monolog\ResettableInterface;
-use Predis;
-use Redis;
 use Symfony\Bridge\Monolog\Handler\FingersCrossed\HttpCodeActivationStrategy;
 use Symfony\Bridge\Monolog\Processor\TokenProcessor;
 use Symfony\Bridge\Monolog\Processor\WebProcessor;
@@ -318,11 +316,11 @@ private function buildHandler(ContainerBuilder $container, $name, array $handler
             if (isset($handler['redis']['id'])) {
                 $clientId = $handler['redis']['id'];
             } elseif ('redis' === $handler['type']) {
-                if (!class_exists(Redis::class)) {
+                if (!class_exists(\Redis::class)) {
                     throw new \RuntimeException('The \Redis class is not available.');
                 }
 
-                $client = new Definition('\Redis');
+                $client = new Definition(\Redis::class);
                 $client->addMethodCall('connect', array($handler['redis']['host'], $handler['redis']['port']));
                 $client->addMethodCall('auth', array($handler['redis']['password']));
                 $client->addMethodCall('select', array($handler['redis']['database']));
@@ -330,11 +328,11 @@ private function buildHandler(ContainerBuilder $container, $name, array $handler
                 $clientId = uniqid('monolog.redis.client.', true);
                 $container->setDefinition($clientId, $client);
             } else {
-                if (!class_exists(Predis\Client::class)) {
+                if (!class_exists(\Predis\Client::class)) {
                     throw new \RuntimeException('The \Predis\Client class is not available.');
                 }
 
-                $client = new Definition('\Predis\Client');
+                $client = new Definition(\Predis\Client::class);
                 $client->setArguments(array(
                     $handler['redis']['host'],
                 ));