diff --git a/.github/workflows/code_analysis.yaml b/.github/workflows/code_analysis.yaml
index 7926b339f..22f156298 100644
--- a/.github/workflows/code_analysis.yaml
+++ b/.github/workflows/code_analysis.yaml
@@ -52,7 +52,7 @@ jobs:
             # see https://github.com/shivammathur/setup-php
             -   uses: shivammathur/setup-php@v2
                 with:
-                    php-version: 8.3
+                    php-version: 8.4
                     coverage: none
 
             # composer install cache - https://github.com/ramsey/composer-install
diff --git a/.github/workflows/downgraded_release.yaml b/.github/workflows/downgraded_release.yaml
index bb502355a..f783c4e93 100644
--- a/.github/workflows/downgraded_release.yaml
+++ b/.github/workflows/downgraded_release.yaml
@@ -19,7 +19,7 @@ jobs:
             -
                 uses: "shivammathur/setup-php@v2"
                 with:
-                    php-version: 8.3
+                    php-version: 8.4
                     coverage: none
 
             # invoke patches
diff --git a/composer.json b/composer.json
index 413714e0d..6c071235f 100644
--- a/composer.json
+++ b/composer.json
@@ -6,7 +6,7 @@
         "bin/swiss-knife"
     ],
     "require": {
-        "php": ">=8.3",
+        "php": ">=8.4",
         "entropy/entropy": "^0.4.0",
         "nette/robot-loader": "^4.1",
         "nette/utils": "^4.1",
@@ -25,8 +25,8 @@
         "symfony/config": "^6.4",
         "symfony/dependency-injection": "^6.4",
         "symplify/easy-coding-standard": "^13.1",
-        "symplify/phpstan-extensions": "^12.0",
-        "tomasvotruba/class-leak": "^2.1|^3.0",
+        "symplify/phpstan-rules": "^14.11",
+        "tomasvotruba/class-leak": "^2.1",
         "tomasvotruba/unused-public": "^2.2",
         "tracy/tracy": "^2.12"
     },
diff --git a/phpstan.neon b/phpstan.neon
index 15e9303ad..8d4af5e8e 100644
--- a/phpstan.neon
+++ b/phpstan.neon
@@ -8,6 +8,12 @@ parameters:
     treatPhpDocTypesAsCertain: false
     errorFormat: symplify
 
+    # see https://github.com/symplify/phpstan-rules
+    symfonyReturnType: true
+    laravelReturnType: true
+    pathStrings: true
+    ctor: true
+
     excludePaths:
         - */Fixture/*
         - */Source/*
diff --git a/src/Command/FinalizeClassesCommand.php b/src/Command/FinalizeClassesCommand.php
index 745241b19..2b708adea 100644
--- a/src/Command/FinalizeClassesCommand.php
+++ b/src/Command/FinalizeClassesCommand.php
@@ -64,7 +64,7 @@ public function run(
         }
 
         $progressClosure = function () use ($noProgress, $progressBar): void {
-            if ($noProgress || !$progressBar instanceof ProgressBar) {
+            if ($noProgress || ! $progressBar instanceof ProgressBar) {
                 return;
             }