diff --git a/src/components/admin/documents/Form.tsx b/src/components/admin/documents/Form.tsx
index 1c77ee3e9..f77bcbeb5 100644
--- a/src/components/admin/documents/Form.tsx
+++ b/src/components/admin/documents/Form.tsx
@@ -23,7 +23,7 @@ const validationSchema = yup
   .object()
   .defined()
   .shape({
-    type: yup.string().oneOf(validDocumentTypes).required(),
+    type: yup.string().oneOf(validDocumentTypes, `Видът трябва да бъде една от следните стойности: ${validDocumentTypes.join(', ')}.s`).required(),
     name: yup.string().trim().min(2).max(20).required(),
     filename: yup.string().trim().min(2).max(20).required(),
     filetype: yup.string().trim().max(3),