diff --git a/personio-personnel-data-api-oa3.yaml b/personio-personnel-data-api-oa3.yaml
index eb3f888..62f15b6 100644
--- a/personio-personnel-data-api-oa3.yaml
+++ b/personio-personnel-data-api-oa3.yaml
@@ -2074,7 +2074,7 @@ components:
           format: date
           description: "Optional date can be added to the uploaded document. Must follow the format: Y-m-d"
         file:
-          type: string
+          type: file
           format: binary
           description: The document that shall be uploaded to an employees profile
       required: