diff --git a/src/Prisma/prisma.service.ts b/src/Prisma/prisma.service.ts
index fbe9ab3..0aecccf 100644
--- a/src/Prisma/prisma.service.ts
+++ b/src/Prisma/prisma.service.ts
@@ -31,6 +31,10 @@ export class PrismaService extends PrismaClient implements OnModuleInit {
         },
       ],
       errorFormat: 'pretty',
+      transactionOptions: {
+        maxWait: 30 * 1000,
+        timeout: 60 * 1000,
+      },
     });
   }
 
diff --git a/src/Service/service.schema.ts b/src/Service/service.schema.ts
index 4864c5c..923f530 100644
--- a/src/Service/service.schema.ts
+++ b/src/Service/service.schema.ts
@@ -9,12 +9,14 @@ import { Builder } from '../Graphql/graphql.builder';
 import { PrismaService } from '../Prisma/prisma.service';
 import { MinioService } from '../Minio/minio.service';
 import { ServiceStatus } from '@prisma/client';
+import { MailService } from '../Mail/mail.service';
 @Injectable()
 export class ServiceSchema extends PothosSchema {
   constructor(
     @Inject(SchemaBuilderToken) private readonly builder: Builder,
     private readonly prisma: PrismaService,
     private readonly minioService: MinioService,
+    private readonly mailService: MailService,
   ) {
     super();
   }
@@ -217,6 +219,75 @@ export class ServiceSchema extends PothosSchema {
           });
         },
       }),
+      approveOrRejectService: t.prismaField({
+        description: 'Approve or reject a service. For moderator only.',
+        type: this.service(),
+        args: {
+          serviceId: t.arg({
+            type: 'String',
+            required: true,
+          }),
+          approve: t.arg({
+            type: 'Boolean',
+            required: true,
+          }),
+        },
+        resolve: async (query, root, args, ctx, info) => {
+          return await this.prisma.$transaction(async (prisma) => {
+            // check if service is already approved or rejected
+            const service = await prisma.service.findUnique({
+              where: { id: args.serviceId },
+            });
+            if (!service) {
+              throw new Error('Service not found');
+            }
+            if (
+              service.status === ServiceStatus.APPROVED ||
+              service.status === ServiceStatus.REJECTED
+            ) {
+              throw new Error('Service is already approved or rejected');
+            }
+            // update service status
+            const updatedService = await prisma.service.update({
+              ...query,
+              where: { id: args.serviceId },
+              data: {
+                status: args.approve
+                  ? ServiceStatus.APPROVED
+                  : ServiceStatus.REJECTED,
+              },
+            });
+            // mail to center owner and staff who requested the service
+            const center = await prisma.center.findUnique({
+              where: { id: service.centerId },
+            });
+            if (!center?.centerOwnerId) {
+              throw new Error('Center owner not found');
+            }
+            const centerOwner = await prisma.user.findUnique({
+              where: { id: center.centerOwnerId },
+            });
+            if (!centerOwner) {
+              throw new Error('Center owner not found');
+            }
+            const centerStaff = await prisma.centerStaff.findMany({
+              where: { centerId: service.centerId },
+            });
+            const staffEmails = centerStaff.map((staff) => staff.staffId);
+            const emails = [centerOwner.email, ...staffEmails];
+            for (const email of emails) {
+              await this.mailService.sendEmail(
+                email,
+                args.approve
+                  ? 'Your service has been approved'
+                  : 'Your service has been rejected',
+                args.approve ? 'service-approved' : 'service-rejected',
+              );
+            }
+            return updatedService;
+          });
+        },
+      }),
     }));
   }
 }