diff --git a/backend/src/graphql/resolver/ContributionResolver.ts b/backend/src/graphql/resolver/ContributionResolver.ts
index 6a5240cd1..623ee19f0 100644
--- a/backend/src/graphql/resolver/ContributionResolver.ts
+++ b/backend/src/graphql/resolver/ContributionResolver.ts
@@ -179,7 +179,7 @@ export class ContributionResolver {
   async listAllContributions(
     @Args()
     { currentPage = 1, pageSize = 5, order = Order.DESC }: Paginated,
-    @Arg('statusFilter', () => [ContributionStatus], { nullable: true })
+    @Arg('statusFilter', () => [ContributionStatus!], { nullable: true })
     statusFilters?: ContributionStatus[],
   ): Promise<ContributionListResult> {
     const where: {