diff --git a/src/controller/session.controller.ts b/src/controller/session.controller.ts
index c77a8fe..2753cff 100644
--- a/src/controller/session.controller.ts
+++ b/src/controller/session.controller.ts
@@ -25,7 +25,7 @@ export class SessionController {
       id: session.id,
       size: session.size,
       userCount: session.users.length,
-      includesRequester: session.users.includes(user),
+      includesRequester: session.users.find((u) => u.id === userId),
       date: session.date,
     }));
   }
@@ -36,7 +36,7 @@ export class SessionController {
     @Body('sessionId') sessionId: string,
   ) {
     const user = await this.userService.getUserById(userId);
-    this.sessionService.joinSession(user, sessionId);
+    await this.sessionService.joinSession(user, sessionId);
   }
 
   @Post('/leave')
@@ -45,6 +45,6 @@ export class SessionController {
     @Body('sessionId') sessionId: string,
   ) {
     const user = await this.userService.getUserById(userId);
-    this.sessionService.leaveSession(user, sessionId);
+    await this.sessionService.leaveSession(user, sessionId);
   }
 }
diff --git a/src/service/session.service.ts b/src/service/session.service.ts
index 3f2a5a4..aa3393a 100644
--- a/src/service/session.service.ts
+++ b/src/service/session.service.ts
@@ -22,7 +22,10 @@ export class SessionService {
   }
 
   public getAllSessions() {
-    return this.sessionRepo.find({ relations: { users: true } });
+    return this.sessionRepo.find({
+      relations: { users: true },
+      order: { date: 'ASC' },
+    });
   }
 
   public async joinSession(user: User, sessionId: string) {
@@ -30,12 +33,15 @@ export class SessionService {
       where: {
         id: sessionId,
       },
+      relations: {
+        users: true,
+      },
     });
     if (!session) {
       throw new NotFoundException();
     }
     if (
-      session.users.find((u) => u === user) ||
+      session.users.find((u) => u.id === user.id) ||
       session.users.length >= session.size
     ) {
       return;
@@ -49,11 +55,14 @@ export class SessionService {
       where: {
         id: sessionId,
       },
+      relations: {
+        users: true,
+      },
     });
     if (!session) {
       throw new NotFoundException();
     }
-    session.users = session.users.filter((u) => u !== user);
+    session.users = session.users.filter((u) => u.id !== user.id);
     await this.sessionRepo.save(session);
   }
 }