diff --git a/backend/src/graphql/model/Decay.ts b/backend/src/graphql/model/Decay.ts
index 0c199f527..f1204e730 100644
--- a/backend/src/graphql/model/Decay.ts
+++ b/backend/src/graphql/model/Decay.ts
@@ -1,4 +1,4 @@
-import { ObjectType, Field } from 'type-graphql'
+import { ObjectType, Field, Int } from 'type-graphql'
 import Decimal from 'decimal.js-light'
 
 @ObjectType()
@@ -29,6 +29,6 @@ export class Decay {
   @Field(() => Date, { nullable: true })
   end: Date | null
 
-  @Field(() => Number, { nullable: true })
+  @Field(() => Int, { nullable: true })
   duration: number | null
 }