diff --git a/src/intervals/memory.ts b/src/intervals/memory.ts
index 64adef3..8149b2d 100644
--- a/src/intervals/memory.ts
+++ b/src/intervals/memory.ts
@@ -2,7 +2,7 @@
 /* eslint-disable no-await-in-loop */
 import { Client } from '..';
 import { RichEmbed } from '../class';
-import { TierInterface } from '../models';
+import { Tiers } from '../models';
 
 const channelID = '691824484230889546';
 
@@ -18,7 +18,7 @@ export default function memory(client: Client) {
         // memory in megabytes
         const memoryConversion = mem / 1024 / 1024;
         const userLimits: { soft?: number, hard?: number } = {};
-        const tier: TierInterface = await client.db.Tier.findOne({ id: acc.tier }).lean().exec();
+        const tier: Tiers = await client.db.Tier.findOne({ id: acc.tier }).lean().exec();
         userLimits.soft = acc.ramLimitNotification;
         userLimits.hard = tier.resourceLimits.ram;
         if ((memoryConversion <= userLimits.soft) && (acc.ramLimitNotification !== 0)) {
diff --git a/src/models/Tier.ts b/src/models/Tier.ts
index ca9e3cf..7542a50 100644
--- a/src/models/Tier.ts
+++ b/src/models/Tier.ts
@@ -1,13 +1,15 @@
 import { Document, Schema, model } from 'mongoose';
 
-export interface TierInterface extends Document {
+export interface Tiers {
   id: number,
   resourceLimits: {
-    // in MB
-    ram: number,
-    // in MB
-    storage: number,
-  },
+    // In MB
+    ram: number, storage: number
+  }
+}
+
+export interface TierInterface extends Tiers, Document {
+  id: number;
 }
 
 const Tier: Schema = new Schema({
diff --git a/src/models/index.ts b/src/models/index.ts
index 6cac9a8..351bbeb 100644
--- a/src/models/index.ts
+++ b/src/models/index.ts
@@ -1,4 +1,4 @@
 export { default as Account, AccountInterface } from './Account';
 export { default as Moderation, ModerationInterface } from './Moderation';
 export { default as Domain, DomainInterface } from './Domain';
-export { default as Tier, TierInterface } from './Tier';
+export { default as Tier, TierInterface, Tiers } from './Tier';