diff --git a/types/koa-bouncer/index.d.ts b/types/koa-bouncer/index.d.ts
index af3a8b6693..91b4973893 100644
--- a/types/koa-bouncer/index.d.ts
+++ b/types/koa-bouncer/index.d.ts
@@ -30,10 +30,10 @@ declare namespace KoaBouncer {
         isNotIn(arr: any[], tip?: string): Validator
         isArray(tip?: string): Validator
         eq(otherVal: string, tip?: string): Validator
-        gt(otherVal: string, tip?: string): Validator
-        gte(otherVal: string, tip?: string): Validator
-        lt(otherVal: string, tip?: string): Validator
-        lte(otherVal: string, tip?: string): Validator
+        gt(otherVal: number, tip?: string): Validator
+        gte(otherVal: number, tip?: string): Validator
+        lt(otherVal: number, tip?: string): Validator
+        lte(otherVal: number, tip?: string): Validator
         isLength(min: number, max: number, tip?: string): Validator
         defaultTo(valueOrFunction: any): Validator
         isString(tip?: string): Validator
diff --git a/types/koa-bouncer/koa-bouncer-tests.ts b/types/koa-bouncer/koa-bouncer-tests.ts
index 0f91658a85..05f84e1b21 100644
--- a/types/koa-bouncer/koa-bouncer-tests.ts
+++ b/types/koa-bouncer/koa-bouncer-tests.ts
@@ -29,6 +29,9 @@ router.post('/users', async (ctx) => {
         .isString()
         .eq(ctx.vals.password1, 'Passwords must match')
 
+    ctx.validateBody('age')
+        .gte(18, 'Must be 18 or older')
+
     console.log(ctx.vals)
 })