diff --git a/packages/twenty-front/src/modules/activities/files/hooks/useUploadAttachmentFile.tsx b/packages/twenty-front/src/modules/activities/files/hooks/useUploadAttachmentFile.tsx
index 2d94d15d8..d68645fe1 100644
--- a/packages/twenty-front/src/modules/activities/files/hooks/useUploadAttachmentFile.tsx
+++ b/packages/twenty-front/src/modules/activities/files/hooks/useUploadAttachmentFile.tsx
@@ -46,6 +46,7 @@ export const useUploadAttachmentFile = () => {
       type: getFileType(file.name),
       [targetableObjectFieldIdName]: targetableObject.id,
       createdAt: new Date().toISOString(),
+      updatedAt: new Date().toISOString(),
     } as Partial<Attachment>;
 
     await createOneAttachment(attachmentToCreate);
diff --git a/packages/twenty-front/src/modules/attachments/types/Attachment.ts b/packages/twenty-front/src/modules/attachments/types/Attachment.ts
index 563e516d2..21f316d8e 100644
--- a/packages/twenty-front/src/modules/attachments/types/Attachment.ts
+++ b/packages/twenty-front/src/modules/attachments/types/Attachment.ts
@@ -1,6 +1,6 @@
 export type Attachment = {
   id: string;
   createdAt: string;
-  updatedAt: Date;
-  deletedAt: Date | null;
+  updatedAt: string;
+  deletedAt: string | null;
 };