diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 860643a..15f9aa2 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -13,15 +13,17 @@ jobs:
     runs-on: "ubuntu-24.04"
 
     strategy:
+      fail-fast: false
       matrix:
         php-version:
-          - "8.2"
           - "8.3"
+          - "8.4"
+          - "8.5"
         dependencies:
           - "highest"
         include:
           - dependencies: "lowest"
-            php-version: "8.2"
+            php-version: "8.3"
 
     steps:
       - name: "Checkout"
diff --git a/.github/workflows/coding-standards.yaml b/.github/workflows/coding-standards.yaml
index ad945c7..6349ab0 100644
--- a/.github/workflows/coding-standards.yaml
+++ b/.github/workflows/coding-standards.yaml
@@ -19,7 +19,7 @@ jobs:
       - name: "Install PHP"
         uses: "shivammathur/setup-php@v2"
         with:
-          php-version: "8.2"
+          php-version: "8.3"
           coverage: "none"
           tools: "cs2pr, pecl"
 
diff --git a/.github/workflows/infection.yaml b/.github/workflows/infection.yaml
index b7efdf5..4ada929 100644
--- a/.github/workflows/infection.yaml
+++ b/.github/workflows/infection.yaml
@@ -20,7 +20,7 @@ jobs:
       - name: "Install PHP"
         uses: "shivammathur/setup-php@v2"
         with:
-          php-version: "8.2"
+          php-version: "8.3"
           coverage: "pcov"
 
       - name: "Install dependencies with Composer"
diff --git a/.github/workflows/static-analysis.yaml b/.github/workflows/static-analysis.yaml
index 2b9533d..6039c51 100644
--- a/.github/workflows/static-analysis.yaml
+++ b/.github/workflows/static-analysis.yaml
@@ -19,7 +19,7 @@ jobs:
       - name: "Install PHP"
         uses: "shivammathur/setup-php@v2"
         with:
-          php-version: "8.2"
+          php-version: "8.3"
           coverage: "none"
           tools: "cs2pr, pecl"
 
diff --git a/composer.json b/composer.json
index b163b46..a1f410e 100644
--- a/composer.json
+++ b/composer.json
@@ -19,9 +19,9 @@
         }
     },
     "require": {
-        "php": "^8.2",
+        "php": "^8.3",
         "league/construct-finder": "^1.4",
-        "phpunit/phpunit": "^11 || ^12"
+        "phpunit/phpunit": "^12 || ^13"
     },
     "require-dev": {
         "cdn77/coding-standard": "^7.0",
diff --git a/src/Stub.php b/src/Stub.php
index 6aee93b..306bda7 100644
--- a/src/Stub.php
+++ b/src/Stub.php
@@ -34,7 +34,6 @@ public static function create(string $class, array $properties = []): object
                 throw new ReflectionException(sprintf('Property "%s" not found', $property));
             }
 
-            $reflectionProperty->setAccessible(true);
             $reflectionProperty->setValue($stub, $value);
         }
 
@@ -59,7 +58,6 @@ public static function extend(object $stub, array $newProperties = []): object
         /** @var array<string, mixed> $properties */
         $properties = [];
         foreach (self::getAllProperties($reflection) as $property) {
-            $property->setAccessible(true);
             if (! $property->isInitialized($stub)) {
                 continue;
             }
diff --git a/tests/StubTest.php b/tests/StubTest.php
index c5bf365..e5cea84 100644
--- a/tests/StubTest.php
+++ b/tests/StubTest.php
@@ -9,6 +9,8 @@
 use Error;
 use ReflectionException;
 
+use const PHP_VERSION_ID;
+
 final class StubTest extends BaseTestCase
 {
     public function testValueIsDefaultWhenNotSet(): void
@@ -67,9 +69,16 @@ public function testPrivateReadonlyPropertyIsSetBypassingConstructor(): void
         self::assertSame('value', $stub->parentReadonlyProperty());
     }
 
-    /** PHP does not allow setting protected or public readonly properties from different scopes */
+    /** PHP < 8.4 does not allow setting public readonly properties from different scopes */
     public function testPublicReadonlyPropertyCannotBeSet(): void
     {
+        if (PHP_VERSION_ID >= 80400) {
+            $stub = Stub::create(ClassWithReadonlyProperty::class, ['parentPublicReadonlyProperty' => 'value']);
+            self::assertSame('value', $stub->parentPublicReadonlyProperty);
+
+            return;
+        }
+
         try {
             Stub::create(ClassWithReadonlyProperty::class, ['parentPublicReadonlyProperty' => 'value']);
         } catch (Error $e) {