diff --git a/.github/workflows/continuous-integration.yaml b/.github/workflows/continuous-integration.yaml
index 7829b6f1f..21e227954 100644
--- a/.github/workflows/continuous-integration.yaml
+++ b/.github/workflows/continuous-integration.yaml
@@ -14,9 +14,9 @@ jobs:
       fail-fast: false
       matrix:
         operating-system: [ ubuntu-latest ]
-        php-version: [ '7.4', '8.0', '8.1' ]
+        php-version: [ '8.1', '8.2', '8.3' ]
         include:
-          - php-version: '8.1'
+          - php-version: '8.3'
             coverage: true
 
     steps:
diff --git a/composer.json b/composer.json
index 60cf2854a..87f5d50cc 100755
--- a/composer.json
+++ b/composer.json
@@ -26,8 +26,8 @@
     "require": {
         "oat-sa/oatbox-extension-installer": "~1.1||dev-master",
         "oat-sa/lib-generis-search": "^2.1.2",
-        "oat-sa/generis": ">=15.39.0",
-        "oat-sa/tao-core": ">=54.23.0",
+        "oat-sa/generis": ">=16.0.0",
+        "oat-sa/tao-core": ">=54.26.0",
         "oat-sa/extension-tao-item": ">=12.4.0",
         "oat-sa/extension-tao-itemqti": ">=30.22.0",
         "oat-sa/extension-tao-test": ">=16.3.0",
diff --git a/model/export/service/SharedStimulusCSSExporter.php b/model/export/service/SharedStimulusCSSExporter.php
index a7434f7d0..4f4e6f31f 100644
--- a/model/export/service/SharedStimulusCSSExporter.php
+++ b/model/export/service/SharedStimulusCSSExporter.php
@@ -23,7 +23,7 @@
 namespace oat\taoMediaManager\model\export\service;
 
 use core_kernel_classes_Resource;
-use League\Flysystem\FilesystemInterface;
+use oat\oatbox\filesystem\FilesystemInterface;
 use oat\oatbox\filesystem\FileSystemService;
 use oat\oatbox\service\ConfigurableService;
 use oat\taoMediaManager\model\fileManagement\FlySystemManagement;
@@ -44,11 +44,11 @@ public function pack(core_kernel_classes_Resource $mediaResource, string $link,
         $fs = $this->getFileSystem();
         $cssPath = dirname($link) . DIRECTORY_SEPARATOR . StoreService::CSS_DIR_NAME;
 
-        if (!$fs->has($cssPath)) {
+        if (!$fs->directoryExists($cssPath)) {
             return;
         }
 
-        $files = $fs->listContents($cssPath);
+        $files = $fs->listContents($cssPath)->toArray();
         if (!count($files)) {
             return;
         }
@@ -56,8 +56,8 @@ public function pack(core_kernel_classes_Resource $mediaResource, string $link,
         $zip->addEmptyDir(self::CSS_ZIP_DIR_NAME);
 
         foreach ($files as $file) {
-            $content = $fs->read($cssPath . DIRECTORY_SEPARATOR . $file['basename']);
-            $zip->addFromString(self::CSS_ZIP_DIR_NAME . DIRECTORY_SEPARATOR . $file['basename'], $content);
+            $content = $fs->read($cssPath . DIRECTORY_SEPARATOR . basename($file['path']));
+            $zip->addFromString(self::CSS_ZIP_DIR_NAME . DIRECTORY_SEPARATOR . basename($file['path']), $content);
         }
     }
 
diff --git a/model/fileManagement/FlySystemManagement.php b/model/fileManagement/FlySystemManagement.php
index f5eeae3fe..a3b0c6e77 100644
--- a/model/fileManagement/FlySystemManagement.php
+++ b/model/fileManagement/FlySystemManagement.php
@@ -23,8 +23,9 @@
 namespace oat\taoMediaManager\model\fileManagement;
 
 use oat\oatbox\filesystem\File;
+use oat\oatbox\filesystem\FilesystemException;
+use oat\oatbox\filesystem\FilesystemInterface;
 use oat\oatbox\service\ConfigurableService;
-use League\Flysystem\Filesystem;
 use Slim\Http\Stream;
 use Psr\Http\Message\StreamInterface;
 use oat\oatbox\filesystem\FileSystemService;
@@ -37,7 +38,7 @@ class FlySystemManagement extends ConfigurableService implements FileManagement
      * @param string|File $fileSource
      * @param string $label
      * @return string
-     * @throws \League\Flysystem\FileExistsException
+     * @throws FilesystemException
      */
     public function storeFile($fileSource, $label)
     {
@@ -54,12 +55,23 @@ public function storeFile($fileSource, $label)
 
     public function deleteDirectory(string $directoryPath): bool
     {
-        return $this->getFilesystem()->deleteDir($directoryPath);
+        try {
+            $this->getFilesystem()->deleteDirectory($directoryPath);
+            return true;
+        } catch (FilesystemException $e) {
+            $this->logWarning($e->getMessage());
+            return false;
+        }
     }
 
     public function getFileSize($link)
     {
-        return $this->getFilesystem()->getSize($link);
+        try {
+            return $this->getFilesystem()->fileSize($link);
+        } catch (FilesystemException $e) {
+            $this->logWarning($e->getMessage());
+            return null;
+        }
     }
 
     /**
@@ -89,13 +101,16 @@ public function retrieveFile($link)
      */
     public function deleteFile($link)
     {
-        return $this->getFilesystem()->delete($link);
+        try {
+            $this->getFilesystem()->delete($link);
+            return true;
+        } catch (FilesystemException $e) {
+            $this->logWarning($e->getMessage());
+            return false;
+        }
     }
 
-    /**
-     * @return Filesystem
-     */
-    protected function getFilesystem()
+    protected function getFilesystem(): FilesystemInterface
     {
         $fs = $this->getServiceLocator()->get(FileSystemService::SERVICE_ID);
         return $fs->getFileSystem($this->getOption(self::OPTION_FS));
diff --git a/model/sharedStimulus/css/repository/StylesheetRepository.php b/model/sharedStimulus/css/repository/StylesheetRepository.php
index 41dc00275..d7fd149e0 100644
--- a/model/sharedStimulus/css/repository/StylesheetRepository.php
+++ b/model/sharedStimulus/css/repository/StylesheetRepository.php
@@ -22,12 +22,10 @@
 
 namespace oat\taoMediaManager\model\sharedStimulus\css\repository;
 
-use core_kernel_classes_Resource;
 use oat\generis\model\data\Ontology;
-use League\Flysystem\FilesystemInterface;
+use oat\oatbox\filesystem\FilesystemException;
+use oat\oatbox\filesystem\FilesystemInterface;
 use oat\oatbox\service\ConfigurableService;
-use oat\taoMediaManager\model\MediaService;
-use League\Flysystem\FileNotFoundException;
 use oat\oatbox\filesystem\FileSystemService;
 use oat\taoMediaManager\model\fileManagement\FlySystemManagement;
 use oat\taoMediaManager\model\fileManagement\FileSourceUnserializer;
@@ -48,35 +46,41 @@ public function getPath(string $uri): string
         return dirname((string) $link);
     }
 
-    public function listContents(string $path): array
+    public function listContents(string $path): iterable
     {
         return $this->getFileSystem()->listContents($path);
     }
 
     /**
-     * @throws FileNotFoundException
+     * @throws FilesystemException
      */
     public function read(string $path): string
     {
         return $this->getFileSystem()->read($path);
     }
 
-    public function put(string $path, string $contents): bool
+    /**
+     * @throws FilesystemException
+     */
+    public function write(string $path, string $contents): void
     {
-        return $this->getFileSystem()->put($path, $contents);
+        $this->getFileSystem()->write($path, $contents);
     }
 
-    public function putStream(string $path, $streamResource): bool
+    /**
+     * @throws FilesystemException
+     */
+    public function writeStream(string $path, $streamResource): void
     {
-        return $this->getFileSystem()->putStream($path, $streamResource);
+        $this->getFileSystem()->writeStream($path, $streamResource);
     }
 
     /**
-     * @throws FileNotFoundException
+     * @throws FilesystemException
      */
-    public function delete(string $path): bool
+    public function delete(string $path): void
     {
-        return $this->getFileSystem()->delete($path);
+        $this->getFileSystem()->delete($path);
     }
 
     private function getFileSystem(): FilesystemInterface
diff --git a/model/sharedStimulus/css/service/ListStylesheetsService.php b/model/sharedStimulus/css/service/ListStylesheetsService.php
index b27c8ffcd..c139055b0 100644
--- a/model/sharedStimulus/css/service/ListStylesheetsService.php
+++ b/model/sharedStimulus/css/service/ListStylesheetsService.php
@@ -35,23 +35,23 @@ public function getList(ListStylesheets $listStylesheetsDTO): array
         $path = $stylesheetRepository->getPath($listStylesheetsDTO->getUri());
         $list = $stylesheetRepository->listContents(
             $path . DIRECTORY_SEPARATOR . StylesheetRepository::STYLESHEETS_DIRECTORY
-        );
+        )->toArray();
         /**
          * here sorting files by creation date so that in case of css .selector collisions
          * the rules will be applied from the last stylesheet added to the passage
          */
         usort($list, function ($a, $b) {
-            return ($a['timestamp'] < $b['timestamp']) ? -1 : 1;
+            return ($a['lastModified'] < $b['lastModified']) ? -1 : 1;
         });
 
         $data = [];
         foreach ($list as $file) {
             $data[] = [
-                'name' => $file['basename'],
-                'uri' => DIRECTORY_SEPARATOR . $file['basename'],
+                'name' => basename($file['path']),
+                'uri' => DIRECTORY_SEPARATOR . basename($file['path']),
                 'mime' => 'text/css',
-                'filePath' => DIRECTORY_SEPARATOR . $file['basename'],
-                'size' => $file['size']
+                'filePath' => DIRECTORY_SEPARATOR . basename($file['path']),
+                'size' => $file['fileSize']
             ];
         }
 
diff --git a/model/sharedStimulus/css/service/LoadStylesheetClassesService.php b/model/sharedStimulus/css/service/LoadStylesheetClassesService.php
index 5975eccef..096369812 100644
--- a/model/sharedStimulus/css/service/LoadStylesheetClassesService.php
+++ b/model/sharedStimulus/css/service/LoadStylesheetClassesService.php
@@ -22,7 +22,7 @@
 
 namespace oat\taoMediaManager\model\sharedStimulus\css\service;
 
-use League\Flysystem\FileNotFoundException;
+use oat\oatbox\filesystem\FilesystemException;
 use oat\oatbox\service\ConfigurableService;
 use oat\taoMediaManager\model\sharedStimulus\css\dto\LoadStylesheet;
 use oat\taoMediaManager\model\sharedStimulus\css\repository\StylesheetRepository;
@@ -45,7 +45,7 @@ public function load(LoadStylesheet $loadStylesheetDTO): array
             );
 
             return $this->cssToArray($content);
-        } catch (FileNotFoundException $e) {
+        } catch (FilesystemException $e) {
             $this->logDebug(
                 sprintf(
                     'Passage %s does not contain stylesheet %s. An empty array will be returned.',
diff --git a/model/sharedStimulus/css/service/SaveStylesheetClassesService.php b/model/sharedStimulus/css/service/SaveStylesheetClassesService.php
index d2d81b556..04921d589 100644
--- a/model/sharedStimulus/css/service/SaveStylesheetClassesService.php
+++ b/model/sharedStimulus/css/service/SaveStylesheetClassesService.php
@@ -23,7 +23,7 @@
 namespace oat\taoMediaManager\model\sharedStimulus\css\service;
 
 use Exception;
-use League\Flysystem\FileNotFoundException;
+use oat\oatbox\filesystem\FilesystemException;
 use oat\oatbox\service\ConfigurableService;
 use oat\taoMediaManager\model\sharedStimulus\css\dto\SaveStylesheetClasses;
 use oat\taoMediaManager\model\sharedStimulus\css\repository\StylesheetRepository;
@@ -52,7 +52,7 @@ public function save(SaveStylesheetClasses $saveStylesheetClassesDTO): void
         }
 
         $content = $this->getCssContentFromArray($cssClassesArray);
-        $this->getStylesheetRepository()->put(
+        $this->getStylesheetRepository()->write(
             $path . DIRECTORY_SEPARATOR . $saveStylesheetClassesDTO->getStylesheetUri(),
             $content
         );
@@ -62,7 +62,7 @@ private function removeStoredStylesheet(string $path): void
     {
         try {
             $this->getStylesheetRepository()->delete($path);
-        } catch (FileNotFoundException $exception) {
+        } catch (FilesystemException $exception) {
             $this->logDebug(sprintf('Stylesheet %s to delete was not found when trying to clear styles', $path));
         }
     }
diff --git a/model/sharedStimulus/css/service/UploadStylesheetService.php b/model/sharedStimulus/css/service/UploadStylesheetService.php
index 5a249075c..f13b86b93 100644
--- a/model/sharedStimulus/css/service/UploadStylesheetService.php
+++ b/model/sharedStimulus/css/service/UploadStylesheetService.php
@@ -39,7 +39,7 @@ public function save(UploadedStylesheet $uploadedStylesheetDTO): array
 
         $tmpResource = $uploadedStylesheetDTO->getFileResource();
         $size = filesize($uploadedStylesheetDTO->getTmpFileLink());
-        $this->getStylesheetRepository()->putStream($link, $tmpResource);
+        $this->getStylesheetRepository()->writeStream($link, $tmpResource);
 
         if (is_resource($tmpResource)) {
             fclose($tmpResource);
diff --git a/model/sharedStimulus/factory/CommandFactory.php b/model/sharedStimulus/factory/CommandFactory.php
index eb3484b7c..af08ef778 100644
--- a/model/sharedStimulus/factory/CommandFactory.php
+++ b/model/sharedStimulus/factory/CommandFactory.php
@@ -22,7 +22,6 @@
 
 namespace oat\taoMediaManager\model\sharedStimulus\factory;
 
-use League\Flysystem\FilesystemInterface;
 use oat\generis\model\fileReference\FileReferenceSerializer;
 use oat\oatbox\filesystem\Directory;
 use oat\oatbox\filesystem\FileSystemService;
@@ -38,7 +37,7 @@ class CommandFactory extends ConfigurableService
 {
     public const DEFAULT_DIRECTORY = 'sharedStimulusUploads';
 
-    /** @var FilesystemInterface */
+    /** @var Directory */
     private $directory;
 
     public function makeCreateCommandByRequest(ServerRequestInterface $request): CreateCommand
diff --git a/model/sharedStimulus/service/PatchService.php b/model/sharedStimulus/service/PatchService.php
index 9f73c1651..c6ebf7db1 100644
--- a/model/sharedStimulus/service/PatchService.php
+++ b/model/sharedStimulus/service/PatchService.php
@@ -26,11 +26,12 @@
 use core_kernel_classes_Resource as Resource;
 use core_kernel_persistence_Exception;
 use InvalidArgumentException;
-use League\Flysystem\FilesystemInterface;
 use LogicException;
 use oat\generis\model\fileReference\FileReferenceSerializer;
 use oat\generis\model\OntologyAwareTrait;
 use oat\oatbox\filesystem\File;
+use oat\oatbox\filesystem\FileSystem;
+use oat\oatbox\filesystem\FilesystemInterface;
 use oat\oatbox\filesystem\FileSystemService;
 use oat\oatbox\service\ConfigurableService;
 use oat\tao\model\media\TaoMediaException;
@@ -82,7 +83,7 @@ public function patch(PatchCommand $command): SharedStimulus
         );
         $sharedStimulusStoredSourceFile = $this->getFileSourceUnserializer()->unserialize((string)$link);
 
-        $this->getFileSystem()->putStream($sharedStimulusStoredSourceFile, $file->readStream());
+        $this->getFileSystem()->writeStream($sharedStimulusStoredSourceFile, $file->readStream());
 
         $content = $file->read();
         $resource->editPropertyValues(
diff --git a/model/sharedStimulus/service/StoreService.php b/model/sharedStimulus/service/StoreService.php
index f2dc10bf8..602ec193f 100644
--- a/model/sharedStimulus/service/StoreService.php
+++ b/model/sharedStimulus/service/StoreService.php
@@ -22,8 +22,9 @@
 
 namespace oat\taoMediaManager\model\sharedStimulus\service;
 
-use League\Flysystem\FilesystemInterface;
 use oat\oatbox\filesystem\File;
+use oat\oatbox\filesystem\FileSystem;
+use oat\oatbox\filesystem\FilesystemInterface;
 use oat\oatbox\filesystem\FileSystemService;
 use oat\oatbox\service\ConfigurableService;
 use oat\taoMediaManager\model\fileManagement\FlySystemManagement;
@@ -69,15 +70,15 @@ public function storeStream(
         $fs = $this->getFileSystem();
 
         $dirname = $this->getUniqueName($stimulusFilename);
-        $fs->createDir($dirname);
+        $fs->createDirectory($dirname);
 
-        $fs->putStream(
+        $fs->writeStream(
             $dirname . DIRECTORY_SEPARATOR . $stimulusFilename,
             $stimulusXmlStream
         );
 
         if (count($cssFiles)) {
-            $fs->createDir($dirname . DIRECTORY_SEPARATOR . self::CSS_DIR_NAME);
+            $fs->createDirectory($dirname . DIRECTORY_SEPARATOR . self::CSS_DIR_NAME);
             foreach ($cssFiles as $file) {
                 if (!file_exists($file)) {
                     $this->getLogger()->notice(sprintf("file %s does not exist", $file));
@@ -89,7 +90,7 @@ public function storeStream(
                     continue;
                 }
 
-                $fs->putStream(
+                $fs->writeStream(
                     $dirname . DIRECTORY_SEPARATOR . self::CSS_DIR_NAME . DIRECTORY_SEPARATOR . basename($file),
                     fopen($file, 'r')
                 );
diff --git a/test/unit/model/sharedStimulus/export/SharedStimulusCSSExporterTest.php b/test/unit/model/sharedStimulus/export/SharedStimulusCSSExporterTest.php
index c87c49cce..335e2c691 100644
--- a/test/unit/model/sharedStimulus/export/SharedStimulusCSSExporterTest.php
+++ b/test/unit/model/sharedStimulus/export/SharedStimulusCSSExporterTest.php
@@ -23,6 +23,7 @@
 namespace oat\taoMediaManager\test\unit\model\export;
 
 use core_kernel_classes_Resource;
+use League\Flysystem\DirectoryListing;
 use oat\generis\test\MockObject;
 use oat\generis\test\TestCase;
 use oat\oatbox\filesystem\FileSystem;
@@ -57,12 +58,12 @@ public function tearDown(): void
     /**
      * @dataProvider packTestDataProvider
      */
-    public function testPack(string $link, string $expectedDir, array $fileNames, array $expectedZippedFiles): void
+    public function testPack(string $link, string $expectedDir, iterable $fileNames, array $expectedZippedFiles): void
     {
         $fileSystemMock = $this->initFileSystemMock();
 
         $fileSystemMock->expects(self::once())
-            ->method('has')
+            ->method('directoryExists')
             ->with($expectedDir)
             ->willReturn(true);
 
@@ -72,7 +73,7 @@ public function testPack(string $link, string $expectedDir, array $fileNames, ar
 
         $fileSystemMock->expects(self::once())
             ->method('listContents')
-            ->willReturn($fileNames);
+            ->willReturn(new DirectoryListing($fileNames));
 
 
         $sharedStimulusCSSExporterService = $this->getPreparedServiceInstance($fileSystemMock);
@@ -89,7 +90,7 @@ public function packTestDataProvider(): array
             [
                 'test_path/stimulus.xml',
                 'test_path/' . StoreService::CSS_DIR_NAME,
-                [['basename' => 'file1.css'], ['basename' => 'file2.css']],
+                [['path' => 'file1.css'], ['path' => 'file2.css']],
                 [
                     $cssZipFolder,
                     $cssZipFolder . 'file1.css',
@@ -105,7 +106,16 @@ public function packTestDataProvider(): array
             [
                 'test_path/stimulusFile',
                 'test_path/' . StoreService::CSS_DIR_NAME,
-                [['basename' => 'fileX']],
+                [['path' => 'fileX']],
+                [
+                    $cssZipFolder,
+                    $cssZipFolder . 'fileX'
+                ],
+            ],
+            [
+                'test_path/stimulusFile',
+                'test_path/' . StoreService::CSS_DIR_NAME,
+                $this->createGenerator([['path' => 'fileX']]),
                 [
                     $cssZipFolder,
                     $cssZipFolder . 'fileX'
@@ -131,7 +141,7 @@ private function initFileSystemMock(): FileSystem
     {
         return $this->getMockBuilder(FileSystem::class)
             ->disableOriginalConstructor()
-            ->onlyMethods(['has', 'listContents', 'read'])
+            ->onlyMethods(['directoryExists', 'listContents', 'read'])
             ->getMock();
     }
 
@@ -159,4 +169,11 @@ private function getPreparedServiceInstance(FileSystem $fileSystemMock): SharedS
         );
         return $service;
     }
+
+    private function createGenerator(array $values): \Generator
+    {
+        foreach ($values as $value) {
+            yield $value;
+        }
+    }
 }
diff --git a/test/unit/model/sharedStimulus/service/StoreServiceTest.php b/test/unit/model/sharedStimulus/service/StoreServiceTest.php
index 08e934018..93e5e7808 100644
--- a/test/unit/model/sharedStimulus/service/StoreServiceTest.php
+++ b/test/unit/model/sharedStimulus/service/StoreServiceTest.php
@@ -54,12 +54,11 @@ public function testStoreSharedStimulus(): void
 
         $fileSystemMock = $this->initFileSystemMock();
         $fileSystemMock->expects(self::once())
-            ->method('createDir')
+            ->method('createDirectory')
             ->with($fakeUniqueName);
 
         $fileSystemMock->expects(self::once())
-            ->method('putStream')
-            ->willReturn(true);
+            ->method('writeStream');
 
         $stimulusStoreService = $this->getPreparedServiceInstance($fileSystemMock);
         $stimulusStoreService->expects(self::once())
@@ -78,7 +77,7 @@ private function initFileSystemMock(): FileSystem
     {
         return $this->getMockBuilder(FileSystem::class)
             ->disableOriginalConstructor()
-            ->onlyMethods(['createDir', 'putStream'])
+            ->onlyMethods(['createDirectory', 'writeStream'])
             ->getMock();
     }