diff --git a/composer.json b/composer.json
index 824e30e..61e2651 100644
--- a/composer.json
+++ b/composer.json
@@ -22,7 +22,7 @@
         "php": ">=7.4",
         "cakephp/cakephp": "^4.5",
         "cakephp/plugin-installer": "^1.3",
-        "knplabs/gaufrette": "^0.11",
+        "knplabs/gaufrette": "^0.7.0|^0.8.0",
         "league/mime-type-detection": "^1.15"
     },
     "require-dev": {
diff --git a/src/Model/Behavior/FileStorageBehavior.php b/src/Model/Behavior/FileStorageBehavior.php
index 6dd9448..c69705f 100644
--- a/src/Model/Behavior/FileStorageBehavior.php
+++ b/src/Model/Behavior/FileStorageBehavior.php
@@ -10,7 +10,6 @@
  */
 namespace Burzum\FileStorage\Model\Behavior;
 
-use ArrayAccess;
 use ArrayObject;
 use Burzum\FileStorage\Storage\StorageTrait;
 use Burzum\FileStorage\Storage\StorageUtils;
@@ -19,7 +18,6 @@
 use Cake\Event\EventDispatcherTrait;
 use Cake\Event\EventInterface;
 use Cake\ORM\Behavior;
-use Cake\Utility\Text;
 
 /**
  * Storage Behavior
@@ -157,7 +155,9 @@ protected function _checkEntityBeforeSave(EntityInterface &$entity): void
                 if ($fileHashMethod === true) {
                     $fileHashMethod = 'sha1';
                 }
-                $entity->set('hash', StorageUtils::getFileHash(Text::uuid(), $fileHashMethod));
+                /** @var \Psr\Http\Message\UploadedFileInterface $file */
+                $file = $entity->get('file');
+                $entity->set('hash', StorageUtils::getFileContentHash((string)$file->getStream(), $fileHashMethod));
             }
         }
     }
diff --git a/src/Storage/Listener/BaseListener.php b/src/Storage/Listener/BaseListener.php
index 4d2a84a..173810b 100644
--- a/src/Storage/Listener/BaseListener.php
+++ b/src/Storage/Listener/BaseListener.php
@@ -11,7 +11,6 @@
 use Burzum\FileStorage\Storage\StorageUtils;
 use Cake\Datasource\EntityInterface;
 use Cake\Event\EventInterface;
-use Cake\Utility\Text;
 use InvalidArgumentException;
 
 /**
@@ -104,7 +103,11 @@ public function afterDelete(EventInterface $event, EntityInterface $entity): voi
     public function afterSave(EventInterface $event, EntityInterface $entity): void
     {
         if ($this->_checkEvent($event) && $entity->isNew()) {
-            $hash = StorageUtils::getFileHash(Text::uuid());
+            $fileField = $this->getConfig('fileField');
+            /** @var \Psr\Http\Message\UploadedFileInterface $file */
+            $file = $entity->get($fileField);
+
+            $hash = StorageUtils::getFileContentHash((string)$file->getStream());
             $path = $this->pathBuilder()->fullPath($entity);
 
             $entity->set('hash', $hash);
diff --git a/src/Storage/StorageUtils.php b/src/Storage/StorageUtils.php
index 15aeefd..c4b3e08 100644
--- a/src/Storage/StorageUtils.php
+++ b/src/Storage/StorageUtils.php
@@ -221,27 +221,22 @@ public static function createTmpFile(?string $folder = null, bool $checkAndCreat
     }
 
     /**
-     * Gets the hash of a file.
+     * Gets the hash of a file contents.
      *
      * You can use this to compare if you got two times the same file uploaded.
-     *
-     * @param string $file Path to the file on your local machine.
-     * @param string $method 'md5' or 'sha1'
-     * @throws \InvalidArgumentException
-     * @link http://php.net/manual/en/function.md5-file.php
-     * @link http://php.net/manual/en/function.sha1-file.php
-     * @link http://php.net/manual/en/function.sha1-file.php#104748
-     * @return string
      */
-    public static function getFileHash(string $file, string $method = 'sha1'): string
+    public static function getFileContentHash(string $fileContent, string $method = 'sha1'): string
     {
         if ($method === 'md5') {
-            return md5_file($file);
+            return md5($fileContent);
         }
         if ($method === 'sha1') {
-            return sha1_file($file);
+            return sha1($fileContent);
         }
 
-        throw new InvalidArgumentException(sprintf('Invalid hash method "%s" provided!', $method));
+        throw new InvalidArgumentException(sprintf(
+            'Invalid hash method "%s" provided!',
+            $method
+        ));
     }
 }
diff --git a/tests/TestCase/Storage/StorageUtilsTest.php b/tests/TestCase/Storage/StorageUtilsTest.php
index 2069813..f58e117 100644
--- a/tests/TestCase/Storage/StorageUtilsTest.php
+++ b/tests/TestCase/Storage/StorageUtilsTest.php
@@ -245,12 +245,12 @@ public function testFileExtension()
      *
      * @return void
      */
-    public function testGetFileHash()
+    public function testGetFileContentHash()
     {
-        $result = StorageUtils::getFileHash($this->fileFixtures . 'titus.jpg');
+        $result = StorageUtils::getFileContentHash(file_get_contents($this->fileFixtures . 'titus.jpg'));
         $this->assertEquals($result, 'd68da24d79835d70d5d8a544f62616d0e51af191');
 
-        $result = StorageUtils::getFileHash($this->fileFixtures . 'titus.jpg', 'md5');
+        $result = StorageUtils::getFileContentHash(file_get_contents($this->fileFixtures . 'titus.jpg'), 'md5');
         $this->assertEquals($result, '29574141b2c44cc029828f6c5c6d3cd2');
     }
 
@@ -259,9 +259,9 @@ public function testGetFileHash()
      *
      * @return void
      */
-    public function testGetFileHashInvalidArgumentException()
+    public function testGetFileContentHashInvalidArgumentException()
     {
         $this->expectException(\InvalidArgumentException::class);
-        StorageUtils::getFileHash($this->fileFixtures . 'titus.jpg', 'invalid-hash-method!');
+        StorageUtils::getFileContentHash(file_get_contents($this->fileFixtures . 'titus.jpg'), 'invalid-hash-method!');
     }
 }