diff --git a/packages/csv-stringify/lib/index.d.ts b/packages/csv-stringify/lib/index.d.ts
index 4c28ef9e..618b7ee6 100644
--- a/packages/csv-stringify/lib/index.d.ts
+++ b/packages/csv-stringify/lib/index.d.ts
@@ -61,7 +61,7 @@ export interface Options extends stream.TransformOptions {
      * can refer to nested properties of the input JSON
      * see the "header" option on how to print columns names on the first line
      */
-    columns?: string[] | PlainObject<string> | ColumnOption[]
+    columns?: readonly string[] | PlainObject<string> | readonly ColumnOption[]
     /**
      * Set the field delimiter, one character only, defaults to a comma.
      */