diff --git a/src/services/api/leaderboard-api.service.ts b/src/services/api/leaderboard-api.service.ts
index bfab5256..191946b8 100644
--- a/src/services/api/leaderboard-api.service.ts
+++ b/src/services/api/leaderboard-api.service.ts
@@ -1,4 +1,4 @@
-import { HasPermission, Routes, Request, Response, Validate, ForwardTo, forwardRequest, Docs } from 'koa-clay'
+import { HasPermission, Routes, Request, Response, Validate, ForwardTo, forwardRequest, Docs, ValidationCondition } from 'koa-clay'
 import LeaderboardAPIPolicy from '../../policies/api/leaderboard-api.policy'
 import APIService from './api-service'
 import { EntityManager } from '@mikro-orm/mysql'
@@ -53,7 +53,19 @@ export default class LeaderboardAPIService extends APIService {
 
   @Validate({
     headers: ['x-talo-alias'],
-    body: ['score']
+    body: {
+      score: {
+        required: true
+      },
+      props: {
+        validation: async (val: unknown): Promise<ValidationCondition[]> => [
+          {
+            check: val ? Array.isArray(val) : true,
+            error: 'Props must be an array'
+          }
+        ]
+      }
+    }
   })
   @HasPermission(LeaderboardAPIPolicy, 'post')
   @Docs(LeaderboardAPIDocs.post)
@@ -61,10 +73,6 @@ export default class LeaderboardAPIService extends APIService {
     const { score, props } = req.body
     const em: EntityManager = req.ctx.em
 
-    if (props && !Array.isArray(props)) {
-      req.ctx.throw(400, 'Props must be an array')
-    }
-
     const leaderboard: Leaderboard = req.ctx.state.leaderboard
 
     let entry: LeaderboardEntry = null
diff --git a/tests/services/_api/leaderboard-api/post.test.ts b/tests/services/_api/leaderboard-api/post.test.ts
index c2ba5184..bff28eb9 100644
--- a/tests/services/_api/leaderboard-api/post.test.ts
+++ b/tests/services/_api/leaderboard-api/post.test.ts
@@ -330,4 +330,30 @@ describe('Leaderboard API service - post', () => {
       { key: 'key1', value: 'value1' }
     ])
   })
+
+  it('should return a 400 if props are not an array', async () => {
+    const [apiKey, token] = await createAPIKeyAndToken([APIKeyScope.WRITE_LEADERBOARDS])
+    const player = await new PlayerFactory([apiKey.game]).one()
+    const leaderboard = await new LeaderboardFactory([apiKey.game]).state(() => ({ unique: false })).one()
+    await (<EntityManager>global.em).persistAndFlush([player, leaderboard])
+
+    const res = await request(global.app)
+      .post(`/v1/leaderboards/${leaderboard.internalName}/entries`)
+      .send({
+        score: 300,
+        props: {
+          key1: 'value1',
+          key2: 'value2'
+        }
+      })
+      .auth(token, { type: 'bearer' })
+      .set('x-talo-alias', String(player.aliases[0].id))
+      .expect(400)
+
+    expect(res.body).toStrictEqual({
+      errors: {
+        props: ['Props must be an array']
+      }
+    })
+  })
 })