diff --git a/.devcontainer/devcontainer.json b/.devcontainer/devcontainer.json
index f92a7009..77e82be6 100644
--- a/.devcontainer/devcontainer.json
+++ b/.devcontainer/devcontainer.json
@@ -8,10 +8,14 @@
   "customizations": {
     "vscode": {
       "extensions": [
-        "junstyle.php-cs-fixer",
         "stylelint.vscode-stylelint",
         "jetmartin.bats",
-        "recca0120.vscode-phpunit"
+        "ms-azuretools.vscode-containers",
+        "github.vscode-github-actions",
+        "ms-vscode.makefile-tools",
+        "ms-vscode-remote.remote-containers",
+        "DEVSENSE.phptools-vscode",
+        "redhat.vscode-yaml"
       ]
     }
   },
diff --git a/Makefile b/Makefile
index 6ebbb1c0..4ba00d24 100644
--- a/Makefile
+++ b/Makefile
@@ -101,6 +101,7 @@ local: build
 	docker stop nextcloud-container || true
 	docker container rm nextcloud-container || true
 	docker run --rm -d -p 8080:80 --name nextcloud-container -e SERVER_BRANCH="v31.0.8" -v .:/var/www/html/apps-extra/gdatavaas ghcr.io/juliusknorr/nextcloud-dev-php84:latest
+	composer install
 
 # Builds the app for production and prepares it for the appstore under ./build/artifacts
 .PHONY: appstore
diff --git a/appinfo/routes.php b/appinfo/routes.php
index 0d0741d2..ffaaf294 100644
--- a/appinfo/routes.php
+++ b/appinfo/routes.php
@@ -27,6 +27,8 @@
 			=> '/getSendMailSummaryOfMaliciousFiles', 'verb' => 'GET'],
 		['name' => 'settings#setSendMailSummaryOfMaliciousFiles', 'url'
 			=> '/setSendMailSummaryOfMaliciousFiles', 'verb' => 'POST'],
-		['name' => 'settings#testsettings', 'url' => '/testsettings', 'verb' => 'POST']
+		['name' => 'settings#testsettings', 'url' => '/testsettings', 'verb' => 'POST'],
+		['name' => 'settings#getCache', 'url' => '/getCache', 'verb' => 'GET'],
+		['name' => 'settings#getHashlookup', 'url' => '/getHashlookup', 'verb' => 'GET']
 	]
 ];
diff --git a/css/style.css b/css/style.css
index 98e73ef9..4099cff2 100644
--- a/css/style.css
+++ b/css/style.css
@@ -25,6 +25,10 @@ select {
 	box-sizing: border-box;
 }
 
+.basic_settings_table .input_field input[type=checkbox] {
+	margin: 8px 0 8px 50px;
+}
+
 input.toggle-round {
 	display: none;
 }
diff --git a/lib/Controller/SettingsController.php b/lib/Controller/SettingsController.php
index 6ed5d532..651a40dc 100644
--- a/lib/Controller/SettingsController.php
+++ b/lib/Controller/SettingsController.php
@@ -51,6 +51,9 @@ public function setconfig(
 		$doNotScanThis,
 		$notifyMails,
 		$maxScanSize,
+		$timeout,
+		bool $cache,
+		bool $hashlookup,
 	): JSONResponse {
 		if (!empty($notifyMails)) {
 			$mails = explode(',', preg_replace('/\s+/', '', $notifyMails));
@@ -63,6 +66,9 @@ public function setconfig(
 		if ((int)$maxScanSize < 1) {
 			return new JSONResponse(['status' => 'error', 'message' => 'Invalid max scan size: ' . $maxScanSize]);
 		}
+		if ((int)$timeout < 1) {
+			return new JSONResponse(['status' => 'error', 'message' => 'Invalid timeout: ' . $timeout]);
+		}
 		$this->config->setValueString($this->appName, 'username', $username);
 		$this->config->setValueString($this->appName, 'password', $password);
 		$this->config->setValueString($this->appName, 'clientId', $clientId);
@@ -73,6 +79,9 @@ public function setconfig(
 		$this->config->setValueString($this->appName, 'doNotScanThis', $doNotScanThis);
 		$this->config->setValueString($this->appName, 'notifyMails', $notifyMails);
 		$this->config->setValueInt($this->appName, 'maxScanSizeInMB', (int)$maxScanSize);
+		$this->config->setValueInt($this->appName, 'timeout', (int)$timeout);
+		$this->config->setValueBool($this->appName, 'cache', $cache);
+		$this->config->setValueBool($this->appName, 'hashlookup', $hashlookup);
 		return new JSONResponse(['status' => 'success']);
 	}
 
@@ -186,4 +195,12 @@ public function testSettings(string $tokenEndpoint, string $vaasUrl): JSONRespon
 			return new JSONResponse(['status' => 'error', 'message' => $e->getMessage()]);
 		}
 	}
+
+	public function getCache(): JSONResponse {
+		return new JSONResponse(['status' => $this->config->getValueBool($this->appName, 'cache', true)]);
+	}
+
+	public function getHashlookup(): JSONResponse {
+		return new JSONResponse(['status' => $this->config->getValueBool($this->appName, 'hashlookup', true)]);
+	}
 }
diff --git a/lib/Service/VerdictService.php b/lib/Service/VerdictService.php
index 5a14dd1a..7e9f12c9 100644
--- a/lib/Service/VerdictService.php
+++ b/lib/Service/VerdictService.php
@@ -210,7 +210,12 @@ public function createAndConnectVaas(): Vaas {
 				$this->vaasUrl = 'https://' . substr($this->vaasUrl, 6);
 			}
 		}
-		$options = new VaasOptions(true, true, $this->vaasUrl);
+		$options = new VaasOptions(
+			useHashLookup: $this->appConfig->getValueBool(Application::APP_ID, 'hashlookup', true),
+			useCache: $this->appConfig->getValueBool(Application::APP_ID, 'cache', true),
+			vaasUrl: $this->vaasUrl,
+			timeout: $this->appConfig->getValueInt(Application::APP_ID, 'timeout', 300)
+		);
 		return Vaas::builder()
 			->withAuthenticator($this->getAuthenticator($this->authMethod, $this->tokenEndpoint))
 			->withOptions($options)
diff --git a/lib/Settings/VaasAdmin.php b/lib/Settings/VaasAdmin.php
index 4e8b92b1..4e3e050f 100644
--- a/lib/Settings/VaasAdmin.php
+++ b/lib/Settings/VaasAdmin.php
@@ -57,7 +57,10 @@ public function getForm(): TemplateResponse {
 				=> $this->config->getValueBool(Application::APP_ID, 'sendMailOnVirusUpload'),
 			'notifyAdminEnabled' => $this->config->getValueBool(Application::APP_ID, 'notifyAdminEnabled'),
 			'maxScanSizeInMB'
-				=> $this->config->getValueInt(Application::APP_ID, 'maxScanSizeInMB', 256)
+				=> $this->config->getValueInt(Application::APP_ID, 'maxScanSizeInMB', 256),
+			'timeout' => $this->config->getValueInt(Application::APP_ID, 'timeout', 300),
+			'cache' => $this->config->getValueBool(Application::APP_ID, 'cache', true),
+			'hashlookup' => $this->config->getValueBool(Application::APP_ID, 'hashlookup', true),
 		];
 
 		return new TemplateResponse(Application::APP_ID, 'admin', $params);
diff --git a/src/admin-settings.js b/src/admin-settings.js
index 56a0a494..305ea4eb 100644
--- a/src/admin-settings.js
+++ b/src/admin-settings.js
@@ -66,6 +66,9 @@ document.addEventListener('DOMContentLoaded', async () => {
 		const doNotScanThis = document.querySelector('#doNotScanThis').value;
 		const notifyMails = document.querySelector('#notify_mails').value;
 		const maxScanSize = document.querySelector('#max-scan-size').value;
+		const timeout = document.querySelector('#timeout').value;
+		const cache = document.querySelector('#cache').checked;
+		const hashlookup = document.querySelector('#hashlookup').checked;
 
 		const response = await postData(OC.generateUrl('apps/gdatavaas/setconfig'), {
 			username: username,
@@ -77,7 +80,10 @@ document.addEventListener('DOMContentLoaded', async () => {
 			scanOnlyThis,
 			doNotScanThis,
 			notifyMails,
-			maxScanSize
+			maxScanSize,
+			timeout,
+			cache,
+			hashlookup
 		});
 		const msgElement = document.querySelector('#auth_save_msg');
 
@@ -203,4 +209,7 @@ document.addEventListener('DOMContentLoaded', async () => {
 		scanCounter.textContent = ' N/A';
 		console.log('Error getting files counter:', filesCounter['message']);
 	}
+
+	document.querySelector('#cache').checked = (await getData(OC.generateUrl('apps/gdatavaas/getCache'))).status;
+	document.querySelector('#hashlookup').checked = (await getData(OC.generateUrl('apps/gdatavaas/getHashlookup'))).status;
 });
diff --git a/src/files-action.js b/src/files-action.js
index 347cf0ab..cd6f8482 100644
--- a/src/files-action.js
+++ b/src/files-action.js
@@ -15,37 +15,42 @@ registerFileAction(new FileAction({
 	},
 	iconSvgInline: () => Magnifier,
 	async exec(file) {
-		const fileId = file.fileid;
-		let response = await fetch(OC.generateUrl('/apps/gdatavaas/scan'), {
-			method: 'POST',
-			headers: {
-				'Content-Type': 'application/json',
-				'requesttoken': oc_requesttoken
-			},
-			body: JSON.stringify({
-				fileId: fileId
-			})
-		});
-		let vaasVerdict = await response.json();
-		if (response.status === 200) {
-			switch (vaasVerdict['verdict']) {
-				case 'Malicious':
-					showError(t('gdatavaas', 'The file "' + file.basename + '" has been scanned with G DATA as verdict Malicious'));
-					break;
-				case 'Clean':
-					showSuccess(t('gdatavaas', 'The file "' + file.basename + '" has been scanned with G DATA as verdict Clean'));
-					break;
-				case 'Pup':
-					showWarning(t('gdatavaas', 'The file "' + file.basename + '" has been scanned with G DATA as ' +
-						'verdict PUP (Potentially unwanted program)'));
-					break;
-			}
-		} else {
-			try {
-				showError(t('gdatavaas', vaasVerdict.error));
-			} catch (e) {
-				showError(t('gdatavaas', 'An unknown error occurred while scanning the file'));
+		try {
+			const fileId = file.fileid;
+			let response = await fetch(OC.generateUrl('/apps/gdatavaas/scan'), {
+				method: 'POST',
+				headers: {
+					'Content-Type': 'application/json',
+					'requesttoken': oc_requesttoken
+				},
+				body: JSON.stringify({
+					fileId: fileId
+				})
+			});
+			let vaasVerdict = await response.json();
+			if (response.status === 200) {
+				switch (vaasVerdict['verdict']) {
+					case 'Malicious':
+						showError(t('gdatavaas', 'The file "' + file.basename + '" has been scanned with G DATA as verdict Malicious'));
+						break;
+					case 'Clean':
+						showSuccess(t('gdatavaas', 'The file "' + file.basename + '" has been scanned with G DATA as verdict Clean'));
+						break;
+					case 'Pup':
+						showWarning(t('gdatavaas', 'The file "' + file.basename + '" has been scanned with G DATA as ' +
+							'verdict PUP (Potentially unwanted program)'));
+						break;
+				}
+			} else {
+				try {
+					showError(t('gdatavaas', vaasVerdict.error));
+				} catch (e) {
+					showError(t('gdatavaas', 'An unknown error occurred while scanning the file'));
+				}
 			}
 		}
+		catch (e) {
+			showError(t('gdatavaas', 'An error occurred while trying to scan the file: ') + e);
+		}
 	},
 }))
diff --git a/templates/admin.php b/templates/admin.php
index 095bb5e2..3825c674 100644
--- a/templates/admin.php
+++ b/templates/admin.php
@@ -19,7 +19,7 @@
 		<h6>You may use self registration and create a new username and password by yourself <a href="https://vaas.gdata.de/login" target="_blank">here</a> for free.</h6>
 		<table class="basic_settings_table">
 			<tr class="basic_settings">
-				<td><div title="<?php p($l->t('If you have registered yourself with your e-mail address and a password, select "Resource Owner Password Flow" here, if you have received a client id and a client secret from G DATA CyberDefense AG, use "Client Credentials Flow". You can ignore the other fields.'));?>" class="visible"><label for="auth_method"><?php p($l->t('Authentication Method'));?></label></div></td>
+				<td><div title="<?php p($l->t('If you have registered yourself with your e-mail address and a password, select "Resource Owner Password Flow" here, if you have received a client id and a client secret from G DATA CyberDefense AG, use "Client Credentials Flow". You can ignore the other fields.'));?>" class="visible"><label for="authMethod"><?php p($l->t('Authentication Method'));?></label></div></td>
 				<td class="input_field">
 					<select id="authMethod" name="authMethod">
 						<option value="ClientCredentials" <?php if ($_['authMethod'] === 'ClientCredentials') {
@@ -66,6 +66,22 @@
 				<td><div title="<?php p($l->t('The maximum scan size for files to be scanned in MB. Files above this limit are tagged as “Won\'t Scan”.'));?>" class="visible"><label for="max-scan-size"><?php p($l->t('Maximum scan size'));?></label></div></td>
 				<td class="input_field"><input id="max-scan-size" type="number" min="0" name="max-scan-size" value="<?php p($_['maxScanSizeInMB']); ?>"/></td>
 			</tr>
+			<tr class="timeout">
+				<td><div title="<?php p($l->t('The timeout determines how long a file scan may take in seconds before it is canceled. Please note: If the timeout is set too short, it will restrict the scanning of large files, which take a little longer.'));?>" class="visible"><label for="timeout"><?php p($l->t('Timeout'));?></label></div></td>
+				<td class="input_field"><input id="timeout" type="number" min="0" name="timeout" value="<?php p($_['timeout']); ?>"/></td>
+			</tr>
+			<tr class="cache">
+				<td><div title="<?php p($l->t('If this option is disabled, each file is always scanned again and no results are cached.'));?>" class="visible"><label for="cache"><?php p($l->t('Cache'));?></label></div></td>
+				<td class="input_field"><input id="cache" type="checkbox" name="cache" <?php if ($_['cache']) {
+					p('checked');
+				} ?>/></td>
+			</tr>
+			<tr class="hashlookup">
+				<td><div title="<?php p($l->t('During a hash lookup, the SHA256 checksum is transmitted to the G DATA Cloud before the scan to check whether a result is already available, thereby saving unnecessary network traffic, resource load, and time.'));?>" class="visible"><label for="hashlookup"><?php p($l->t('Hash lookup'));?></label></div></td>
+				<td class="input_field"><input id="hashlookup" type="checkbox" name="hashlookup" <?php if ($_['hashlookup']) {
+					p('checked');
+				} ?>/></td>
+			</tr>
 		</table>
 		<input class="submit-button" id="auth_submit" type="submit" value="<?php p($l->t('Save'));?>" />
 		<span id="auth_save_msg"></span>
diff --git a/tests/bats/functionality-parallel.bats b/tests/bats/functionality-parallel.bats
index 97b38047..0f6edf30 100755
--- a/tests/bats/functionality-parallel.bats
+++ b/tests/bats/functionality-parallel.bats
@@ -16,6 +16,7 @@ setup_file() {
     # this is cache busting
     $DOCKER_EXEC_WITH_USER nextcloud-container php occ files:scan --all
     sleep 2
+    $DOCKER_EXEC_WITH_USER nextcloud-container php occ app:enable gdatavaas
 }
 
 @test "test admin eicar Upload" {
@@ -68,7 +69,6 @@ setup_file() {
     dd if=/dev/zero of=$FOLDER_PREFIX/too-large.dat  bs=268435457  count=1
 
     docker cp $FOLDER_PREFIX/too-large.dat nextcloud-container:/var/www/html/data/$TESTUSER/files/$TESTUSER.too-large.dat
-    docker exec -i nextcloud-container chown www-data:www-data /var/www/html/data/$TESTUSER/files/$TESTUSER.too-large.dat
     $DOCKER_EXEC_WITH_USER nextcloud-container php occ files:scan --all
     $DOCKER_EXEC_WITH_USER nextcloud-container php occ gdatavaas:scan
 
@@ -93,7 +93,6 @@ setup_file() {
 
 @test "test unscanned job for testuser" {
     docker cp $FOLDER_PREFIX/pup.exe nextcloud-container:/var/www/html/data/$TESTUSER/files/$TESTUSER.unscanned.pup.exe
-    docker exec -i nextcloud-container chown www-data:www-data /var/www/html/data/$TESTUSER/files/$TESTUSER.unscanned.pup.exe
     $DOCKER_EXEC_WITH_USER nextcloud-container php occ files:scan $TESTUSER
     $DOCKER_EXEC_WITH_USER nextcloud-container php occ gdatavaas:tag-unscanned
 
diff --git a/tests/bats/functionality-sequential.bats b/tests/bats/functionality-sequential.bats
index 39833f34..10ce98ef 100644
--- a/tests/bats/functionality-sequential.bats
+++ b/tests/bats/functionality-sequential.bats
@@ -6,7 +6,7 @@
 
 setup_file() {
     source tests/bats/.env-test || return 1
-    source .env-local || echo "No .env-local file found."
+    source .env-local || source .env || echo "No .env files found."
     mkdir -p $FOLDER_PREFIX/
     curl --output $FOLDER_PREFIX/pup.exe http://amtso.eicar.org/PotentiallyUnwanted.exe
     $DOCKER_EXEC_WITH_USER --env OC_PASS=$TESTUSER_PASSWORD nextcloud-container php occ user:add $TESTUSER --password-from-env || echo "already exists"
@@ -16,7 +16,7 @@ setup_file() {
     BATS_NO_PARALLELIZE_WITHIN_FILE=true
     # this is cache busting
     $DOCKER_EXEC_WITH_USER nextcloud-container php occ files:scan --all
-    docker exec nextcloud-container chown -R www-data:www-data /var/www/html/
+    $DOCKER_EXEC_WITH_USER nextcloud-container php occ app:enable gdatavaas
 }
 
 @test "test upload when vaas does not function" {