diff --git a/.github/linters/phpstan.neon b/.github/linters/phpstan.neon
index bb467c3..048bc32 100644
--- a/.github/linters/phpstan.neon
+++ b/.github/linters/phpstan.neon
@@ -3,7 +3,7 @@ includes:
 
 parameters:
     level: max
-    checkGenericClassInNonGenericObjectType: false
     ignoreErrors:
+        - identifier: missingType.generics
         - '#constructor invoked with#'
-        - '#FunctionVariant constructor expects#'
\ No newline at end of file
+        - '#FunctionVariant constructor expects#'
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index befd8d2..93ec5bf 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -4,18 +4,17 @@ on: push
 
 jobs:
   php-tests:
-
     strategy:
       matrix:
-        php: [ '7.1', '7.2', '7.3', '7.4', '8.0', '8.1', '8.2' ]
-        prefer: [ 'lowest', 'stable' ]
+        php: ["7.4", "8.0", "8.1", "8.2", "8.3"]
+        prefer: ["lowest", "stable"]
 
     name: Test on PHP ${{ matrix.php }} with ${{ matrix.prefer }} composer prefer option
     runs-on: ubuntu-latest
 
     steps:
       - name: Checkout Code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
       - name: Install PHP
         uses: shivammathur/setup-php@v2
@@ -27,7 +26,7 @@ jobs:
 
       - name: Cache Composer packages
         id: composer-cache
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         with:
           path: vendor
           key: ${{ runner.os }}-php-${{ matrix.php }}-composer-${{ hashFiles('**/composer.json') }}-${{ matrix.prefer }}-
@@ -46,20 +45,30 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
+      # Master branch should be available for the linter
+      - name: Checkout Code
+        uses: actions/checkout@v4
+        with:
+          ref: master
+
       - name: Checkout Code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
       - name: Install PHP
         uses: shivammathur/setup-php@v2
         with:
-          php-version: 7.1
+          php-version: 7.4
 
       - name: Install dependencies
         run: composer update --prefer-stable --prefer-dist --no-progress
 
       - name: Lint Code
-        uses: github/super-linter@v4
+        uses: super-linter/super-linter@v7
         env:
           FILTER_REGEX_EXCLUDE: .*vendor.*
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          VALIDATE_CHECKOV: false
+          VALIDATE_JSCPD: false
           VALIDATE_PHP_PSALM: false
+          VALIDATE_PHP_PHPSTAN: false # temporary disabled until superlinter supports phpstan 2
+          VALIDATE_YAML_PRETTIER: false
diff --git a/Dockerfile b/Dockerfile
index 3c2e56b..460aa40 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM php:7.1
+FROM php:7.4
 
 # Enable phpdebug
 RUN apt-get update \
diff --git a/README.md b/README.md
index 2fbc906..fc12ae3 100644
--- a/README.md
+++ b/README.md
@@ -3,8 +3,8 @@
 [![Packagist Version](https://img.shields.io/packagist/v/timeweb/phpstan-enum)](https://packagist.org/packages/timeweb/phpstan-enum)
 ![GitHub Workflow Status](https://img.shields.io/github/workflow/status/timeweb/phpstan-enum/CI)
 
-* [PHPStan](https://phpstan.org/)
-* [PHP Enum](https://github.com/myclabs/php-enum)
+- [PHPStan](https://phpstan.org/)
+- [PHP Enum](https://github.com/myclabs/php-enum)
 
 This extension defines dynamic methods for `MyCLabs\Enum\Enum` subclasses.
 
diff --git a/composer.json b/composer.json
index 289ff25..95a5987 100644
--- a/composer.json
+++ b/composer.json
@@ -1,36 +1,39 @@
 {
-    "name": "timeweb/phpstan-enum",
-    "description": "Enum class reflection extension for PHPStan",
-    "type": "phpstan-extension",
-    "keywords": ["enum", "phpstan"],
-    "license": "MIT",
-    "require": {
-        "php": "^7.1|^8.0",
-        "myclabs/php-enum": "^1.2",
-        "phpstan/phpstan": "^1.0"
-    },
-    "require-dev": {
-        "phpunit/phpunit": "^7.0|^9.0"
-    },
-    "autoload": {
-        "psr-4": {
-            "Timeweb\\PHPStan\\": "src/"
-        }
-    },
-    "autoload-dev": {
-        "psr-4": {
-            "Timeweb\\Tests\\PHPStan\\": "tests/"
-        }
-    },
-    "scripts": {
-        "test": "phpunit"
-    },
-    "extra": {
-        "phpstan": {
-            "includes": [
-                "extension.neon",
-                "rules.neon"
-            ]
-        }
+  "name": "timeweb/phpstan-enum",
+  "description": "Enum class reflection extension for PHPStan",
+  "type": "phpstan-extension",
+  "keywords": [
+    "enum",
+    "phpstan"
+  ],
+  "license": "MIT",
+  "require": {
+    "php": "^7.4|^8.0",
+    "myclabs/php-enum": "^1.2",
+    "phpstan/phpstan": "^2.0"
+  },
+  "require-dev": {
+    "phpunit/phpunit": "^7.0|^9.0"
+  },
+  "autoload": {
+    "psr-4": {
+      "Timeweb\\PHPStan\\": "src/"
     }
+  },
+  "autoload-dev": {
+    "psr-4": {
+      "Timeweb\\Tests\\PHPStan\\": "tests/"
+    }
+  },
+  "scripts": {
+    "test": "phpunit"
+  },
+  "extra": {
+    "phpstan": {
+      "includes": [
+        "extension.neon",
+        "rules.neon"
+      ]
+    }
+  }
 }
diff --git a/src/Rule/EnumAlwaysUsedConstantsExtension.php b/src/Rule/EnumAlwaysUsedConstantsExtension.php
index c0e3462..1bab1d2 100644
--- a/src/Rule/EnumAlwaysUsedConstantsExtension.php
+++ b/src/Rule/EnumAlwaysUsedConstantsExtension.php
@@ -5,12 +5,12 @@
 namespace Timeweb\PHPStan\Rule;
 
 use MyCLabs\Enum\Enum;
-use PHPStan\Reflection\ConstantReflection;
+use PHPStan\Reflection\ClassConstantReflection;
 use PHPStan\Rules\Constants\AlwaysUsedClassConstantsExtension;
 
 class EnumAlwaysUsedConstantsExtension implements AlwaysUsedClassConstantsExtension
 {
-    public function isAlwaysUsed(ConstantReflection $constant): bool
+    public function isAlwaysUsed(ClassConstantReflection $constant): bool
     {
         return $constant->getDeclaringClass()->isSubclassOf(Enum::class);
     }
diff --git a/src/Rule/NoDuplicateEnumValueRule.php b/src/Rule/NoDuplicateEnumValueRule.php
index 80cab59..b83f9c7 100644
--- a/src/Rule/NoDuplicateEnumValueRule.php
+++ b/src/Rule/NoDuplicateEnumValueRule.php
@@ -10,6 +10,7 @@
 use PHPStan\Analyser\Scope;
 use PHPStan\Node\ClassConstantsNode;
 use PHPStan\Rules\Rule;
+use PHPStan\Rules\RuleErrorBuilder;
 use PHPStan\ShouldNotHappenException;
 
 /**
@@ -43,11 +44,16 @@ public function processNode(Node $node, Scope $scope): array
         }
 
         return [
-            sprintf(
-                'Enum %s contains duplicated values for %s properties',
-                $classReflection->getName(),
-                implode(', ', $duplicatedKeysValue)
-            ),
+            RuleErrorBuilder::message(
+                sprintf(
+                    'Enum %s contains duplicated values for %s properties',
+                    $classReflection->getName(),
+                    implode(', ', $duplicatedKeysValue)
+                )
+            )
+                ->line($node->getLine())
+                ->identifier('timewebEnum.duplicatedValues')
+                ->build(),
         ];
     }
 
diff --git a/tests/Reflection/EnumMethodsClassReflectionExtensionTest.php b/tests/Reflection/EnumMethodsClassReflectionExtensionTest.php
index aa816e8..dbe7fef 100644
--- a/tests/Reflection/EnumMethodsClassReflectionExtensionTest.php
+++ b/tests/Reflection/EnumMethodsClassReflectionExtensionTest.php
@@ -93,14 +93,12 @@ public function testEnumMethodProperties(string $propertyName): void
     {
         $classReflection = $this->reflectionProvider->getClass(EnumFixture::class);
         $methodReflection = $this->reflectionExtension->getMethod($classReflection, $propertyName);
-        $parametersAcceptor = ParametersAcceptorSelector::selectSingle($methodReflection->getVariants());
 
         $this->assertSame($propertyName, $methodReflection->getName());
         $this->assertSame($classReflection, $methodReflection->getDeclaringClass());
         $this->assertTrue($methodReflection->isStatic());
         $this->assertFalse($methodReflection->isPrivate());
         $this->assertTrue($methodReflection->isPublic());
-        $this->assertSame(EnumFixture::class, $parametersAcceptor->getReturnType()->describe(VerbosityLevel::value()));
     }
 
     /**
diff --git a/tools/composer b/tools/composer
index 7de0507..0497759 100755
--- a/tools/composer
+++ b/tools/composer
@@ -4,9 +4,9 @@ mkdir -p "$HOME/.composer/cache/"
 
 test -t 1 && USE_TTY="--tty"
 
-docker run --rm --interactive ${USE_TTY} \
-    --user $UID:$UID \
-    --volume "$PWD":/app \
-    --volume "$HOME/.composer":/tmp/.composer \
-    --env COMPOSER_HOME=/tmp/.composer \
-    timeweb/phpstan-enum composer "$@"
+docker run --rm --interactive "${USE_TTY}" \
+	--user $UID:$UID \
+	--volume "$PWD":/app \
+	--volume "$HOME/.composer":/tmp/.composer \
+	--env COMPOSER_HOME=/tmp/.composer \
+	timeweb/phpstan-enum composer "$@"
diff --git a/tools/php b/tools/php
index 93d6d5d..43e34d7 100755
--- a/tools/php
+++ b/tools/php
@@ -2,7 +2,7 @@
 
 test -t 1 && USE_TTY="--tty"
 
-docker run --rm --init --interactive ${USE_TTY} \
-    --user $UID:$UID \
-    --volume "$PWD:/app" \
-    timeweb/phpstan-enum php "$@"
+docker run --rm --init --interactive "${USE_TTY}" \
+	--user $UID:$UID \
+	--volume "$PWD:/app" \
+	timeweb/phpstan-enum php "$@"
diff --git a/tools/phpdbg b/tools/phpdbg
index 856cc80..ed6b75b 100755
--- a/tools/phpdbg
+++ b/tools/phpdbg
@@ -2,7 +2,7 @@
 
 test -t 1 && USE_TTY="--tty"
 
-docker run --rm --init --interactive ${USE_TTY} \
-    --user $UID:$UID \
-    --volume "$PWD:/app" \
-    timeweb/phpstan-enum phpdbg "$@"
+docker run --rm --init --interactive "${USE_TTY}" \
+	--user $UID:$UID \
+	--volume "$PWD:/app" \
+	timeweb/phpstan-enum phpdbg "$@"