diff --git a/README.md b/README.md
index dde7355..50d0b0e 100644
--- a/README.md
+++ b/README.md
@@ -19,7 +19,7 @@ Main features:
 > [!IMPORTANT]
 > Require PHP 8.0+ and Elasticsearch 8+.
 
-Works with **Elasticsearch 7** as well but is not officially supported by Elastica 8. Use with caution.
+Works with **Elasticsearch 7** as well, but is not officially supported by Elastica 8. Use with caution.
 
 Version 2+ does not work with **OpenSearch** anymore due to restrictions added by Elastic on their client.
 
@@ -249,7 +249,9 @@ Then configure the bundle:
 # config/packages/elastically.yaml
 elastically:
     connections:
+        # You can create multiple clients
         default:
+            # Any Elastica option works here
             client:
                 hosts:
                     - '127.0.0.1:9200'
@@ -272,6 +274,10 @@ elastically:
 
             # If you want to add a prefix for your index in elasticsearch (you can still call it by its base name everywhere!)
             # prefix: '%kernel.environment%'
+
+            # Use HttpClient component
+            transport_config:
+                http_client: 'Psr\Http\Client\ClientInterface'
 ```
 
 Finally, inject one of those service (autowirable) in you code where you need
@@ -340,8 +346,8 @@ JoliCode\Elastically\Client:
         $config:
             hosts:
                 - '127.0.0.1:9200'
-            transport_client:
-                client: '@my_custom_psr18_client' # An instance of Symfony\Component\HttpClient\Psr18Client (Or any PSR 18 compliant one)
+            transport_config:
+                http_client: 'Psr\Http\Client\ClientInterface'
 ```
 
 See the [official documentation on how to get a PSR-18 client](https://symfony.com/doc/current/http_client.html#psr-18-and-psr-17).
@@ -440,7 +446,6 @@ $factory = new Factory([
 
 - some "todo" in the code
 - optional Doctrine connector
-- better logger - maybe via a processor? extending _log is supposed to be deprecated :(
 - extra commands to monitor, update mapping, reindex... Commonly implemented tasks
 - optional Symfony integration:
   - web debug toolbar!
diff --git a/UPGRADE.md b/UPGRADE.md
index 6a2248c..a820313 100644
--- a/UPGRADE.md
+++ b/UPGRADE.md
@@ -2,17 +2,16 @@
 
 ## From v1.9.0 to v2.0.0
 
+> [!WARNING]  
+> All the deprecation from Elastica 7 to Elastica 8 apply to this major version,
+> [see their UPGRADE first](https://github.com/ruflin/Elastica/blob/58042887616eeb63621412c03bc903056bbcee7e/UPGRADE-8.0.md#upgrade-from-73-to-80).
+
 HttpClientTransport has been removed, you must replace it with [a PSR-18 client](https://symfony.com/doc/current/http_client.html#psr-18-and-psr-17):
 
 ```diff
-    JoliCode\Elastically\Client:
-        arguments:
-            $config:
-                host: '%env(ELASTICSEARCH_HOST)%'
-                port: '%env(ELASTICSEARCH_PORT)%'
--               transport: '@JoliCode\Elastically\Transport\HttpClientTransport'
-+               transport_client:
-+                   client: '@my_custom_psr18_client' # An instance of Symfony\Component\HttpClient\Psr18Client (Or any PSR 18 compliant one)
+-    transport: '@JoliCode\Elastically\Transport\HttpClientTransport'
++    transport_config:
++        http_client: 'Psr\Http\Client\ClientInterface'
 ```
 
 Code has been cleaned of deprecations:
@@ -37,7 +36,7 @@ Code has been cleaned of deprecations:
 - Removed `\JoliCode\Elastically\Client::getDenormalizer`, use the Factory (`\JoliCode\Elastically\Factory`) or DIC
 - Removed `\JoliCode\Elastically\Client::getSerializerContext`, use the Factory (`\JoliCode\Elastically\Factory`) or DIC
 - Using `\Elastica\Document::setData` to store your DTO will not work anymore, you must use `\JoliCode\Elastically\Model\Document` instead
-- 
+
 ## From v1.3.0 to v1.4.0
 
 If you're using Symfony, here are the changes to apply:
diff --git a/src/Bridge/Symfony/DependencyInjection/Configuration.php b/src/Bridge/Symfony/DependencyInjection/Configuration.php
index 63b5ee2..8fd0f0b 100644
--- a/src/Bridge/Symfony/DependencyInjection/Configuration.php
+++ b/src/Bridge/Symfony/DependencyInjection/Configuration.php
@@ -31,7 +31,7 @@ public function getConfigTreeBuilder(): TreeBuilder
                             ->arrayNode('client')
                                 ->info('All options for the Elastica client constructor')
                                 ->example([
-                                    'host' => '%env(ELASTICSEARCH_HOST)%',
+                                    'hosts' => ['%env(ELASTICSEARCH_HOST)%', 'http://localhost:9200'],
                                 ])
                                 ->normalizeKeys(false)
                                 ->defaultValue([])