diff --git a/src/tools/draft-delivery-manifest.js b/src/tools/draft-delivery-manifest.js
index f7cf62e..62ba223 100644
--- a/src/tools/draft-delivery-manifest.js
+++ b/src/tools/draft-delivery-manifest.js
@@ -60,7 +60,7 @@ export function createDraftDeliveryManifestTool() {
                                     items: {
                                         type: 'object',
                                         additionalProperties: false,
-                                        required: ['position', 'count', 'vpe', 'unit', 'articleName', 'liefArtNr', 'mwst', 'eknetto'],
+                                        required: ['position', 'count', 'vpe', 'articleName', 'liefArtNr', 'mwst', 'eknetto'],
                                         properties: {
                                             position: { type: 'number', description: P.position },
                                             count: { type: 'number', description: P.count },