diff --git a/packages/backend/src/core/entities/InstanceEntityService.ts b/packages/backend/src/core/entities/InstanceEntityService.ts
index 8bba150ec..7d16a7a80 100644
--- a/packages/backend/src/core/entities/InstanceEntityService.ts
+++ b/packages/backend/src/core/entities/InstanceEntityService.ts
@@ -47,6 +47,7 @@ export class InstanceEntityService {
 			faviconUrl: instance.faviconUrl,
 			themeColor: instance.themeColor,
 			infoUpdatedAt: instance.infoUpdatedAt ? instance.infoUpdatedAt.toISOString() : null,
+			latestRequestReceivedAt: instance.latestRequestReceivedAt ? instance.latestRequestReceivedAt.toISOString() : null,
 		};
 	}
 
diff --git a/packages/backend/src/models/json-schema/federation-instance.ts b/packages/backend/src/models/json-schema/federation-instance.ts
index 4ad84d02f..442e1076f 100644
--- a/packages/backend/src/models/json-schema/federation-instance.ts
+++ b/packages/backend/src/models/json-schema/federation-instance.ts
@@ -103,5 +103,10 @@ export const packedFederationInstanceSchema = {
 			optional: false, nullable: true,
 			format: 'date-time',
 		},
+		latestRequestReceivedAt: {
+			type: 'string',
+			optional: false, nullable: true,
+			format: 'date-time',
+		},
 	},
 } as const;