diff --git a/types/airtable/index.d.ts b/types/airtable/index.d.ts
index ba943425fe..7c778ac2f9 100644
--- a/types/airtable/index.d.ts
+++ b/types/airtable/index.d.ts
@@ -15,7 +15,11 @@ declare global {
 
     namespace Airtable {
         interface FieldSet {
-            [key: string]: undefined | string | ReadonlyArray<Attachment>;
+            [key: string]:
+                | undefined
+                | string
+                | ReadonlyArray<string>
+                | ReadonlyArray<Attachment>;
         }
 
         interface AirtableOptions {