diff --git a/.scrutinizer.yml b/.scrutinizer.yml
index 326990e..2f16f37 100644
--- a/.scrutinizer.yml
+++ b/.scrutinizer.yml
@@ -11,18 +11,30 @@ build_failure_conditions:
 build:
     dependencies:
         override:
-            - make build
+            -
+              command: make build
+              title: Build deps
+              idle_timeout: 240
     tests:
         stop_on_failure: true
         override:
             -
                 command: make coverage
+                title: Coverage
                 idle_timeout: 1200
                 coverage:
                     file: 'build/coverage/clover.xml'
                     format: 'php-clover'
-            - php-scrutinizer-run --enable-security-analysis
-            - make codestyle
+            -
+              command: make codestyle
+              title: Code style
+            -
+              command: composer global require maglnet/composer-require-checker && composer-require-checker check composer.json
+              title: Composer-require-checker
+            -
+              command: php-scrutinizer-run --enable-security-analysis
+              title: Scrutinizer checks
+
     cache:
         directories:
             - ~/.composer
diff --git a/README.md b/README.md
index 40977d7..74d597f 100644
--- a/README.md
+++ b/README.md
@@ -15,6 +15,14 @@ See [yoanm/symfony-jsonrpc-params-validator](https://github.com/yoanm/symfony-js
 
 See [yoanm/symfony-jsonrpc-http-server-doc](https://github.com/yoanm/symfony-jsonrpc-http-server-doc) for documentation generation.
 
+## Versions
+
+- Symfony v3/4 - PHP >=7.1 : `^v2.0`
+
+  ⚠️⚠️ `v2.1.0` and `v2.1.1` was badly taggued, used `v3.0.0` instead ! ⚠️⚠️
+
+- Symfony v4/5 - PHP >=7.2 : `^v3.0`
+
 ## How to use
 
 Once configured, your project is ready to handle HTTP `POST` request on `/json-rpc` endpoint.
diff --git a/composer.json b/composer.json
index c27cfe8..512a4b3 100644
--- a/composer.json
+++ b/composer.json
@@ -26,7 +26,6 @@
     }
   },
   "suggest": {
-    "yoanm/symfony-jsonrpc-server-psr11-resolver": "PSR-11 compliant method resolver for yoanm/symfony-jsonrpc-http-server",
     "yoanm/symfony-jsonrpc-params-validator": "Symfony bundle for easy JSON-RPC params validation",
     "yoanm/symfony-jsonrpc-http-server-doc": "JSON-RPC documentation Bundle"
   },
@@ -37,7 +36,9 @@
     "symfony/http-kernel": "^4.0 || ^5.0",
     "symfony/config": "^4.0 || ^5.0",
     "symfony/dependency-injection": "^4.0 || ^5.0",
-    "symfony/event-dispatcher": "^4.0 || ^5.0"
+    "symfony/event-dispatcher": "^4.0 || ^5.0",
+    "symfony/event-dispatcher-contracts": "^1.0 || ^2.0",
+    "psr/container": "^1.0"
   },
   "require-dev": {
     "behat/behat": "~3.0",