diff --git a/backend/api/controllers/ape-keys.ts b/backend/api/controllers/ape-keys.ts
index 87456a722..ab78340fb 100644
--- a/backend/api/controllers/ape-keys.ts
+++ b/backend/api/controllers/ape-keys.ts
@@ -46,6 +46,7 @@ class ApeKeysController {
       hash: saltyHash,
       createdOn: Date.now(),
       modifiedOn: Date.now(),
+      lastUsedOn: -1,
     };
 
     const apeKeyId = await ApeKeysDAO.addApeKey(uid, apeKey);
diff --git a/backend/dao/ape-keys.ts b/backend/dao/ape-keys.ts
index 118a971da..20e948af2 100644
--- a/backend/dao/ape-keys.ts
+++ b/backend/dao/ape-keys.ts
@@ -72,6 +72,16 @@ class ApeKeysDAO {
     const apeKeys = _.omit(user.apeKeys, keyId);
     await UsersDAO.setApeKeys(uid, apeKeys);
   }
+
+  static async updateLastUsedOn(
+    user: MonkeyTypes.User,
+    keyId: string
+  ): Promise<void> {
+    checkIfKeyExists(user.apeKeys, keyId);
+
+    user.apeKeys[keyId].lastUsedOn = Date.now();
+    await UsersDAO.setApeKeys(user.uid, user.apeKeys);
+  }
 }
 
 export default ApeKeysDAO;
diff --git a/backend/middlewares/auth.ts b/backend/middlewares/auth.ts
index 7e749c080..2c4d3d304 100644
--- a/backend/middlewares/auth.ts
+++ b/backend/middlewares/auth.ts
@@ -1,6 +1,7 @@
 import _ from "lodash";
 import { compare } from "bcrypt";
 import UsersDAO from "../dao/user";
+import ApeKeysDAO from "../dao/ape-keys";
 import MonkeyError from "../utils/error";
 import { verifyIdToken } from "../utils/auth";
 import { base64UrlDecode } from "../utils/misc";
@@ -165,6 +166,8 @@ async function authenticateWithApeKey(
       throw new MonkeyError(400, "Invalid ApeKey");
     }
 
+    await ApeKeysDAO.updateLastUsedOn(keyOwner, keyId);
+
     return {
       uid,
       email: keyOwner.email,
diff --git a/backend/types/types.d.ts b/backend/types/types.d.ts
index c8c9c1401..269c2d976 100644
--- a/backend/types/types.d.ts
+++ b/backend/types/types.d.ts
@@ -70,6 +70,7 @@ declare namespace MonkeyTypes {
     hash: string;
     createdOn: number;
     modifiedOn: number;
+    lastUsedOn: number;
     enabled: boolean;
   }