diff --git a/composer.json b/composer.json
index 4f3e777c..6fe5f486 100644
--- a/composer.json
+++ b/composer.json
@@ -61,8 +61,8 @@
         "oat-sa/oatbox-extension-installer": "~1.1||dev-master",
         "oat-sa/lib-lti1p3-ags": "~2",
         "oat-sa/lib-lti1p3-core": "~7",
-        "oat-sa/generis" : ">=15.40.0",
-        "oat-sa/tao-core" : ">=54.10.0"
+        "oat-sa/generis": ">=16.0.0",
+        "oat-sa/tao-core": ">=54.26.0"
     },
     "autoload" : {
         "psr-4" : {
diff --git a/models/classes/ExceptionInterpreter.php b/models/classes/ExceptionInterpreter.php
index 13b33dc1..5a722b6c 100644
--- a/models/classes/ExceptionInterpreter.php
+++ b/models/classes/ExceptionInterpreter.php
@@ -77,6 +77,6 @@ private function log($msg)
             ->get(FileSystemService::SERVICE_ID)
             ->getFileSystem(self::FILESYSTEM_ID_TO_LOG);
 
-        $fs->put('lti_' . $this->exception->getKey() . '.log', $msg);
+        $fs->write('lti_' . $this->exception->getKey() . '.log', $msg);
     }
 }
diff --git a/models/classes/Security/DataAccess/Repository/PlatformKeyChainRepository.php b/models/classes/Security/DataAccess/Repository/PlatformKeyChainRepository.php
index 11c8d235..02d282f0 100644
--- a/models/classes/Security/DataAccess/Repository/PlatformKeyChainRepository.php
+++ b/models/classes/Security/DataAccess/Repository/PlatformKeyChainRepository.php
@@ -23,11 +23,12 @@
 namespace oat\taoLti\models\classes\Security\DataAccess\Repository;
 
 use common_exception_NoImplementation;
-use League\Flysystem\FilesystemInterface;
 use OAT\Library\Lti1p3Core\Security\Key\Key;
 use OAT\Library\Lti1p3Core\Security\Key\KeyChain;
 use OAT\Library\Lti1p3Core\Security\Key\KeyChainInterface;
 use OAT\Library\Lti1p3Core\Security\Key\KeyChainRepositoryInterface;
+use oat\oatbox\filesystem\FilesystemException;
+use oat\oatbox\filesystem\FilesystemInterface;
 use oat\oatbox\filesystem\FileSystemService;
 use oat\oatbox\service\ConfigurableService;
 use oat\tao\model\security\Business\Domain\Key\Key as TaoKey;
@@ -69,25 +70,23 @@ protected function save(KeyChainInterface $keyChain, string $identifier): void
 
         $publicKeyPath = $configs[self::OPTION_DEFAULT_PUBLIC_KEY_PATH] ?? null;
         $privateKeyPath = $configs[self::OPTION_DEFAULT_PRIVATE_KEY_PATH] ?? null;
-        $isPublicKeySaved = false;
-        $isPrivateKeySaved = false;
 
         if ($publicKeyPath !== null && $privateKeyPath !== null) {
-            $isPublicKeySaved = $this->getFileSystem()
-                ->put(
-                    ltrim($publicKeyPath, DIRECTORY_SEPARATOR),
-                    $keyChain->getPublicKey()->getContent()
-                );
-
-            $isPrivateKeySaved = $this->getFileSystem()
-                ->put(
-                    ltrim($privateKeyPath, DIRECTORY_SEPARATOR),
-                    $keyChain->getPrivateKey()->getContent()
-                );
-        }
-
-        if (!$isPublicKeySaved || !$isPrivateKeySaved) {
-            throw new PlatformKeyChainException('Impossible to write LTI keys');
+            try {
+                $this->getFileSystem()
+                    ->write(
+                        ltrim($publicKeyPath, DIRECTORY_SEPARATOR),
+                        $keyChain->getPublicKey()->getContent()
+                    );
+
+                $this->getFileSystem()
+                    ->write(
+                        ltrim($privateKeyPath, DIRECTORY_SEPARATOR),
+                        $keyChain->getPrivateKey()->getContent()
+                    );
+            } catch (\Exception $e) {
+                throw new PlatformKeyChainException('Impossible to write LTI keys', 0, $e);
+            }
         }
     }
 
@@ -114,8 +113,8 @@ public function find(string $identifier): ?KeyChainInterface
             throw new PlatformKeyChainException('The key path is not defined');
         }
 
-        $publicKey = $this->getFileSystem()->read($publicKeyPath);
-        $privateKey = $this->getFileSystem()->read($privateKeyPath);
+        $publicKey = $this->readKey($publicKeyPath);
+        $privateKey = $this->readKey($privateKeyPath);
 
         if ($publicKey === false || $privateKey === false) {
             throw new PlatformKeyChainException('Impossible to read LTI keys');
@@ -140,8 +139,8 @@ public function findAll(KeyChainQuery $query): KeyChainCollection
             $privateKeyPassphrase = $configs[self::OPTION_DEFAULT_PRIVATE_KEY_PASSPHRASE] ?? null;
 
             if ($defaultKeyId && $publicKeyPath && $privateKeyPath) {
-                $publicKey = $this->getFileSystem()->read($publicKeyPath);
-                $privateKey = $this->getFileSystem()->read($privateKeyPath);
+                $publicKey = $this->readKey($publicKeyPath);
+                $privateKey = $this->readKey($privateKeyPath);
 
                 $keyChains[] = new TaoKeyChain(
                     $defaultKeyId,
@@ -168,6 +167,15 @@ public function findByKeySetName(string $keySetName): array
         throw new common_exception_NoImplementation();
     }
 
+    private function readKey(string $path): string
+    {
+        try {
+            return $this->getFileSystem()->read($path);
+        } catch (FilesystemException $e) {
+            throw new PlatformKeyChainException('Impossible to read LTI keys');
+        }
+    }
+
     private function getFileSystem(): FilesystemInterface
     {
         /** @var FileSystemService $fileSystemService */
diff --git a/test/unit/models/classes/Security/DataAccess/Repository/PlatformKeyChainRepositoryTest.php b/test/unit/models/classes/Security/DataAccess/Repository/PlatformKeyChainRepositoryTest.php
index e16b5988..a7d03b4a 100644
--- a/test/unit/models/classes/Security/DataAccess/Repository/PlatformKeyChainRepositoryTest.php
+++ b/test/unit/models/classes/Security/DataAccess/Repository/PlatformKeyChainRepositoryTest.php
@@ -22,6 +22,8 @@
 
 namespace oat\taoLti\test\unit\models\classes\Security\DataAccess\Repository;
 
+use League\Flysystem\UnableToReadFile;
+use League\Flysystem\UnableToWriteFile;
 use oat\generis\test\ServiceManagerMockTrait;
 use OAT\Library\Lti1p3Core\Security\Key\Key;
 use OAT\Library\Lti1p3Core\Security\Key\KeyChain;
@@ -129,7 +131,7 @@ public function testFindFails(): void
     {
         $this->fileSystem
             ->method('read')
-            ->willReturn(false);
+            ->willThrowException(new UnableToReadFile());
 
         $keyChain = $this->subject->find('');
 
@@ -147,8 +149,7 @@ public function testFindWithEmptyPathFails(): void
     public function testSaveDefaultKeyChain(): void
     {
         $this->fileSystem
-            ->method('put')
-            ->willReturn(true);
+            ->method('write');
 
         $this->subject->saveDefaultKeyChain(
             new KeyChain('keyId', '', new Key(''), new Key(''))
@@ -160,8 +161,8 @@ public function testSaveDefaultKeyChain(): void
     public function testSaveDefaultKeyChainFails(): void
     {
         $this->fileSystem
-            ->method('put')
-            ->willReturn(false);
+            ->method('write')
+            ->willThrowException(new UnableToWriteFile());
 
         $this->expectException(PlatformKeyChainException::class);
         $this->expectExceptionMessage('Impossible to write LTI keys');