diff --git a/lib/Db/SessionMapper.php b/lib/Db/SessionMapper.php
index 186f81929c..41254f3029 100644
--- a/lib/Db/SessionMapper.php
+++ b/lib/Db/SessionMapper.php
@@ -34,7 +34,7 @@ public function find(int $boardId, string $userId, string $token): Session {
 			throw new DoesNotExistException('Session is invalid');
 		}
 		$session = Session::fromRow($data);
-		if ($session->getUserId() != $userId || $session->getBoardId() != $boardId) {
+		if ($session->getUserId() !== $userId || $session->getBoardId() !== $boardId) {
 			throw new DoesNotExistException('Session is invalid');
 		}
 		return $session;
diff --git a/lib/Service/SessionService.php b/lib/Service/SessionService.php
index 0f4c76f383..5a955270fc 100644
--- a/lib/Service/SessionService.php
+++ b/lib/Service/SessionService.php
@@ -71,7 +71,7 @@ public function closeSession(int $boardId, string $token): void {
 		}
 		$this->eventDispatcher->dispatchTyped(new SessionClosedEvent($boardId, $this->userId));
 	}
-	
+
 	public function removeInactiveSessions(): int {
 		return $this->sessionMapper->deleteInactive();
 	}
@@ -90,7 +90,7 @@ public function notifyAllSessions(IQueue $queue, int $boardId, $event, $body, $c
 			}
 
 			// don't notify the same user multiple times
-			if (!in_array($session->getUserId(), $userIds)) {
+			if (!in_array($session->getUserId(), $userIds, true)) {
 				$userIds[] = $session->getUserId();
 			}
 		}