diff --git a/.github/workflows/build-phar.yml b/.github/workflows/build-phar.yml
index b8bb4d79..559a104f 100644
--- a/.github/workflows/build-phar.yml
+++ b/.github/workflows/build-phar.yml
@@ -12,7 +12,7 @@ jobs:
       fail-fast: false
       matrix:
           include:
-              - php: 8.0
+              - php: 8.1
                 tools: "composer:v2"
                 coverage: "none"
                 git-fetch-depth: 1
diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index 5ad0ea3a..a380d170 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -8,7 +8,7 @@ jobs:
     - name: Checkout code
       uses: actions/checkout@master
     - name: Checking PHP syntax error
-      uses: overtrue/phplint@8.0
+      uses: overtrue/phplint@8.1
       with:
         path: .
         options: --exclude=*.log
diff --git a/Dockerfile b/Dockerfile
index e8480aec..2f4d0887 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,7 +1,7 @@
-ARG VERSION=8.0
+ARG VERSION=8.1
 
 FROM composer:2.0 AS build
-RUN composer global require overtrue/phplint:^4.0.0
+RUN composer global require overtrue/phplint:^5.0.0
 
 FROM php:${VERSION}-cli-alpine
 COPY --from=build /tmp/vendor /root/.composer/vendor
diff --git a/composer.json b/composer.json
index 8553ed5a..9a5f4321 100644
--- a/composer.json
+++ b/composer.json
@@ -16,12 +16,12 @@
     }
   ],
   "require": {
-    "php": ">=8.0",
+    "php": ">=8.1",
     "ext-json": "*",
-    "symfony/console": "^5.3.11|^6.0",
-    "symfony/finder": "^5.3.7|^6.0",
-    "symfony/process": "^5.3.12|^6.0",
-    "symfony/yaml": "^5.3.11|^6.0",
+    "symfony/console": "^6.0",
+    "symfony/finder": "^6.0",
+    "symfony/process": "^6.0",
+    "symfony/yaml": "^6.0",
     "n98/junit-xml": "1.1.0"
   },
   "require-dev": {
@@ -68,5 +68,10 @@
   },
   "bin": [
     "bin/phplint"
-  ]
+  ],
+  "config": {
+    "allow-plugins": {
+      "bamarni/composer-bin-plugin": true
+    }
+  }
 }
diff --git a/src/Cache.php b/src/Cache.php
index f59d1011..023b7fc9 100644
--- a/src/Cache.php
+++ b/src/Cache.php
@@ -15,7 +15,7 @@ public static function get(): mixed
         return $content ? json_decode($content, true) : null;
     }
 
-    #[Pure]
+    #[Pure(true)]
     public static function exists(): bool
     {
         return file_exists(self::getFilename());