diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 4e5da7d..6cf4805 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -20,14 +20,20 @@ jobs:
                 symfony:
                     - '5.4.*'
                     - '6.4.*'
-                    - '7.0.*'
+                    - '7.3.*'
                 include:
                     - php: '8.1'
                       symfony: '5.4.*'
                       dependency: 'lowest'
+                    - php: '8.4'
+                      symfony: '7.4.*@dev'
+                      dependency: ''
+                    - php: '8.4'
+                      symfony: '8.0.*@dev'
+                      dependency: ''
                 exclude:
                     - php: '8.1'
-                      symfony: '7.0.*'
+                      symfony: '7.3.*'
             fail-fast: false
         steps:
             - name: Checkout
diff --git a/composer.json b/composer.json
index c519220..32ff386 100644
--- a/composer.json
+++ b/composer.json
@@ -15,7 +15,7 @@
     "require": {
         "php": "^8.1",
         "phpunit/phpunit": "^10.5 || ^11.0 || ^12.0",
-        "symfony/config": "^5.4 || ^6.2 || ^7.0"
+        "symfony/config": "^5.4 || ^6.4 || ^7.0 || ^8.0"
     },
     "autoload": {
         "psr-4" : { "Matthias\\SymfonyConfigTest\\" : "" },
@@ -26,7 +26,7 @@
     },
     "extra": {
         "branch-alias": {
-            "dev-master": "5.1.x-dev"
+            "dev-master": "6.x-dev"
         }
     },
     "minimum-stability": "dev",