diff --git a/.github/workflows/php.yml b/.github/workflows/php.yml
index 59f4749..64a6b5f 100644
--- a/.github/workflows/php.yml
+++ b/.github/workflows/php.yml
@@ -10,7 +10,7 @@ jobs:
     strategy:
       fail-fast: true
       matrix:
-        php: [8.1, 8.2, 8.3] #
+        php: [8.1, 8.2, 8.3, 8.4] #
         os: [ubuntu-latest, macOS-latest] # windows-latest,
 #        include:
 #          - os: 'ubuntu-latest'
diff --git a/src/File.php b/src/File.php
index 9332a7c..1b1e600 100644
--- a/src/File.php
+++ b/src/File.php
@@ -191,7 +191,7 @@ public static function getContents(
         bool $useIncludePath = false,
         $context = null,
         int $offset = 0,
-        int $maxlen = null
+        ?int $maxlen = null
     ): string {
         if (!is_file($filename)) {
             throw new InvalidArgumentException("No such file: $filename");
diff --git a/src/Traits/FileSystemFuncTrait.php b/src/Traits/FileSystemFuncTrait.php
index c4c18ef..c712c46 100644
--- a/src/Traits/FileSystemFuncTrait.php
+++ b/src/Traits/FileSystemFuncTrait.php
@@ -268,6 +268,10 @@ public static function realpath(string $path): string
         }
 
         $absolutes = [];
+        if ($path[0] === '/') {
+            $absolutes[] = '/';
+        }
+
         foreach ($parts as $part) {
             if ('.' === $part) {
                 continue;