diff --git a/src/entity/counter.ts b/src/entity/counter.ts
index 80321e1..7fcac27 100644
--- a/src/entity/counter.ts
+++ b/src/entity/counter.ts
@@ -1,6 +1,7 @@
-import { Entity, PrimaryGeneratedColumn, Column, CreateDateColumn, UpdateDateColumn } from "typeorm";
+import { Entity, PrimaryGeneratedColumn, Column, CreateDateColumn, UpdateDateColumn, Index } from "typeorm";
 
 @Entity("counter")
+@Index(["type", "scope_id", "counter_date"], { unique: true })
 export class Counter {
 	@PrimaryGeneratedColumn("uuid")
 	id: string;