diff --git a/src/services/attendee/attendee-router.ts b/src/services/attendee/attendee-router.ts
index 41d827e..4401cbb 100644
--- a/src/services/attendee/attendee-router.ts
+++ b/src/services/attendee/attendee-router.ts
@@ -185,11 +185,11 @@ attendeeRouter.get(
     async (req, res, next) => {
         try {
             const attendeeData = AttendeeFilterValidator.parse(req.body);
+            const projection = Object.assign({}, ...attendeeData.projection);
             const attendees = await Database.ATTENDEE.find(
-                attendeeData.in,
-                attendeeData.out
+                attendeeData.filter,
+                projection
             );
-
             return res.status(StatusCodes.OK).json(attendees);
         } catch (error) {
             next(error);
diff --git a/src/services/attendee/attendee-schema.ts b/src/services/attendee/attendee-schema.ts
index e0069dd..9e3088b 100644
--- a/src/services/attendee/attendee-schema.ts
+++ b/src/services/attendee/attendee-schema.ts
@@ -94,6 +94,8 @@ export const EventIdValidator = z.object({
 export const PartialAttendeeValidator = AttendeeValidator.partial();
 
 export const AttendeeFilterValidator = z.object({
-    in: PartialAttendeeValidator,
-    out: z.map(PartialAttendeeValidator.keyof(), z.number().min(0).max(1)),
+    filter: PartialAttendeeValidator,
+    projection: z.array(
+        z.record(PartialAttendeeValidator.keyof(), z.number().min(1).max(1))
+    ),
 });