diff --git a/backend/src/graphql/resolver/TransactionLinkResolver.ts b/backend/src/graphql/resolver/TransactionLinkResolver.ts
index 468a276f1..65bb3e80d 100644
--- a/backend/src/graphql/resolver/TransactionLinkResolver.ts
+++ b/backend/src/graphql/resolver/TransactionLinkResolver.ts
@@ -27,6 +27,7 @@ import { Context, getUser, getClientTimezoneOffset } from '@/server/context'
 import { calculateBalance } from '@/util/validate'
 import { RIGHTS } from '@/auth/RIGHTS'
 import { calculateDecay } from '@/util/decay'
+import { QueryLinkResult } from '@union/QueryLinkResult'
 import { TRANSACTIONS_LOCK } from '@/util/TRANSACTIONS_LOCK'
 import { LogError } from '@/server/LogError'
 import {
@@ -39,7 +40,6 @@ import {
 import { executeTransaction } from './TransactionResolver'
 import { getUserCreation, validateContribution } from './util/creations'
 import { getLastTransaction } from './util/getLastTransaction'
-import QueryLinkResult from '../union/QueryLinkResult'
 
 // TODO: do not export, test it inside the resolver
 export const transactionLinkCode = (date: Date): string => {
diff --git a/backend/src/graphql/union/QueryLinkResult.ts b/backend/src/graphql/union/QueryLinkResult.ts
index 390175d1d..fdf1c7b17 100644
--- a/backend/src/graphql/union/QueryLinkResult.ts
+++ b/backend/src/graphql/union/QueryLinkResult.ts
@@ -3,7 +3,7 @@ import { createUnionType } from 'type-graphql'
 import { ContributionLink } from '@model/ContributionLink'
 import { TransactionLink } from '@model/TransactionLink'
 
-export default createUnionType({
+export const QueryLinkResult = createUnionType({
   name: 'QueryLinkResult', // the name of the GraphQL union
   types: () => [TransactionLink, ContributionLink] as const, // function that returns tuple of object types classes
 })
diff --git a/backend/src/server/cors.ts b/backend/src/server/cors.ts
index c05fd8544..95663695d 100644
--- a/backend/src/server/cors.ts
+++ b/backend/src/server/cors.ts
@@ -1,4 +1,4 @@
-import { default as corsLib } from 'cors'
+import corsLib from 'cors'
 
 const corsOptions = {
   origin: '*',