diff --git a/.github/workflows/php.yml b/.github/workflows/php.yml
index a32272e..b188dfd 100644
--- a/.github/workflows/php.yml
+++ b/.github/workflows/php.yml
@@ -17,6 +17,7 @@ jobs:
           - '8.1'
           - '8.2'
           - '8.3'
+          - '8.4'
 
     steps:
     - uses: actions/checkout@v2
diff --git a/composer.json b/composer.json
index 9c7aa07..5d31948 100644
--- a/composer.json
+++ b/composer.json
@@ -48,7 +48,7 @@
 		"ockcyp/covers-validator": "^1.3.3",
 		"phpstan/phpstan": "^0.12.68 || ^1.0.0",
 		"phpmd/phpmd": "^2.9.1",
-		"vimeo/psalm": "^4.4.1",
+		"vimeo/psalm": "^5.26.1",
 		"maglnet/composer-require-checker": "^3.0|^2.0"
 	},
 	"autoload": {