diff --git a/lib/Service/MailService.php b/lib/Service/MailService.php
index 6ed3386..5ce72f7 100644
--- a/lib/Service/MailService.php
+++ b/lib/Service/MailService.php
@@ -32,11 +32,11 @@ use OCA\Registration\Db\Registration;
 use OCP\Defaults;
 use OCP\IGroupManager;
 use OCP\IL10N;
-use OCP\ILogger;
 use OCP\IURLGenerator;
 use OCP\Mail\IMailer;
 use OCP\Util;
 use OCP\IConfig;
+use Psr\Log\LoggerInterface;
 
 class MailService {
 
@@ -52,7 +52,7 @@ class MailService {
 	private $groupManager;
 	/** @var LoginFlowService */
 	private $loginFlowService;
-	/** @var ILogger */
+	/** @var LoggerInterface */
 	private $logger;
 	/** @var IConfig */
 	private $config;
@@ -64,7 +64,7 @@ class MailService {
 								IGroupManager $groupManager,
 								IConfig $config,
 								LoginFlowService $loginFlowService,
-								ILogger $logger) {
+								LoggerInterface $logger) {
 		$this->urlGenerator = $urlGenerator;
 		$this->mailer = $mailer;
 		$this->config = $config;
diff --git a/lib/Service/RegistrationService.php b/lib/Service/RegistrationService.php
index fb5c5b0..72c36f3 100644
--- a/lib/Service/RegistrationService.php
+++ b/lib/Service/RegistrationService.php
@@ -43,7 +43,6 @@ use OCA\Registration\Db\Registration;
 use OCA\Registration\Db\RegistrationMapper;
 use OCP\Accounts\IAccountManager;
 use OCP\AppFramework\Db\DoesNotExistException;
-use OCP\ILogger;
 use OCP\IRequest;
 use OCP\ISession;
 use OCP\IURLGenerator;
@@ -56,6 +55,7 @@ use \OCP\IGroupManager;
 use \OCP\IL10N;
 use \OCP\IConfig;
 use \OCP\Security\ISecureRandom;
+use Psr\Log\LoggerInterface;
 
 class RegistrationService {
 
@@ -83,7 +83,7 @@ class RegistrationService {
 	private $userSession;
 	/** @var IRequest */
 	private $request;
-	/** @var ILogger */
+	/** @var LoggerInterface */
 	private $logger;
 	/** @var ISession */
 	private $session;
@@ -105,7 +105,7 @@ class RegistrationService {
 		ISecureRandom $random,
 		IUserSession $userSession,
 		IRequest $request,
-		ILogger $logger,
+		LoggerInterface $logger,
 		ISession $session,
 		IProvider $tokenProvider,
 		ICrypto $crypto
diff --git a/tests/Unit/Service/RegistrationServiceTest.php b/tests/Unit/Service/RegistrationServiceTest.php
index 9c96dc1..4bca6db 100644
--- a/tests/Unit/Service/RegistrationServiceTest.php
+++ b/tests/Unit/Service/RegistrationServiceTest.php
@@ -11,7 +11,6 @@ use OCP\Accounts\IAccountManager;
 use OCP\IConfig;
 use OCP\IGroupManager;
 use OCP\IL10N;
-use OCP\ILogger;
 use OC\Authentication\Token\IProvider;
 use OCP\IRequest;
 use OCP\Security\ISecureRandom;
@@ -24,6 +23,7 @@ use OCP\IUserSession;
 
 use ChristophWurst\Nextcloud\Testing\DatabaseTransaction;
 use ChristophWurst\Nextcloud\Testing\TestCase;
+use Psr\Log\LoggerInterface;
 
 /**
  * class RegistrationServiceTest
@@ -55,7 +55,7 @@ class RegistrationServiceTest extends TestCase {
 	private $usersession;
 	/** @var IRequest */
 	private $request;
-	/** @var ILogger */
+	/** @var LoggerInterface */
 	private $logger;
 	/** @var ISession */
 	private $session;
@@ -84,7 +84,7 @@ class RegistrationServiceTest extends TestCase {
 		$this->random = \OC::$server->getSecureRandom();
 		$this->usersession = $this->createMock(IUserSession::class);
 		$this->request = $this->createMock(IRequest::class);
-		$this->logger = $this->createMock(ILogger::class);
+		$this->logger = $this->createMock(LoggerInterface::class);
 		$this->session = $this->createMock(ISession::class);
 		$this->tokenProvider = $this->createMock(IProvider::class);
 		$this->crypto = $this->createMock(ICrypto::class);