diff --git a/packages/excel-builder-vanilla/package.json b/packages/excel-builder-vanilla/package.json
index 49e55c1..fbc8217 100644
--- a/packages/excel-builder-vanilla/package.json
+++ b/packages/excel-builder-vanilla/package.json
@@ -31,6 +31,9 @@
     "access": "public"
   },
   "type": "module",
+  "files": [
+    "dist"
+  ],
   "main": "./dist/index.js",
   "exports": {
     ".": {
diff --git a/packages/excel-builder-vanilla/src/Excel/Drawings.ts b/packages/excel-builder-vanilla/src/Excel/Drawings.ts
index e895f82..abfd761 100644
--- a/packages/excel-builder-vanilla/src/Excel/Drawings.ts
+++ b/packages/excel-builder-vanilla/src/Excel/Drawings.ts
@@ -1,9 +1,16 @@
 import { uniqueId } from '../utilities/uniqueId.js';
-import { Chart } from './Drawing/Chart.js';
 import type { Drawing } from './Drawing/Drawing.js';
-import { Picture } from './Drawing/Picture.js';
 import { RelationshipManager } from './RelationshipManager.js';
 import { Util } from './Util.js';
+import type { XMLDOM, XMLNode } from './XMLDOM.js';
+
+type RelationshipTarget = Parameters<RelationshipManager['getRelationshipId']>[0];
+type RelationshipDrawing = Drawing & {
+  getMediaData?: () => RelationshipTarget;
+  getMediaType: () => Parameters<RelationshipManager['addRelation']>[1];
+  setRelationshipId: (rId: string) => void;
+  toXML: (doc: XMLDOM) => XMLNode;
+};
 
 /**
  * @module Excel/Drawings
@@ -36,22 +43,15 @@ export class Drawings {
     drawings.setAttribute('xmlns:xdr', Util.schemas.spreadsheetDrawing);
 
     for (let i = 0, l = this.drawings.length; i < l; i++) {
-      const item = this.drawings[i];
-      if (item instanceof Picture) {
-        let rId = this.relations.getRelationshipId(item.getMediaData());
-        if (!rId) {
-          rId = this.relations.addRelation(item.getMediaData(), item.getMediaType());
-        }
-        item.setRelationshipId(rId);
-        drawings.appendChild(item.toXML(doc));
-      } else if (item instanceof Chart) {
-        let rId = this.relations.getRelationshipId(item);
-        if (!rId) {
-          rId = this.relations.addRelation(item, item.getMediaType());
-        }
-        item.setRelationshipId(rId);
-        drawings.appendChild(item.toXML(doc));
+      const item = this.drawings[i] as Partial<RelationshipDrawing>;
+      if (!item.getMediaType || !item.setRelationshipId || !item.toXML) {
+        continue;
       }
+      const target = (item.getMediaData?.() ?? item) as RelationshipTarget;
+      const mediaType = item.getMediaType();
+      const rId = this.relations.getRelationshipId(target) || this.relations.addRelation(target, mediaType);
+      item.setRelationshipId(rId);
+      drawings.appendChild(item.toXML(doc));
     }
     return doc;
   }
diff --git a/packages/excel-builder-vanilla/src/Excel/__tests__/Drawings.spec.ts b/packages/excel-builder-vanilla/src/Excel/__tests__/Drawings.spec.ts
index 36039fb..31be38e 100644
--- a/packages/excel-builder-vanilla/src/Excel/__tests__/Drawings.spec.ts
+++ b/packages/excel-builder-vanilla/src/Excel/__tests__/Drawings.spec.ts
@@ -2,6 +2,7 @@ import { describe, expect, test } from 'vitest';
 
 import { createWorkbook } from '../../factory.js';
 import { Chart } from '../Drawing/Chart.js';
+import { Drawing } from '../Drawing/Drawing.js';
 import { Picture } from '../Drawing/Picture.js';
 import { Drawings } from '../Drawings.js';
 import { Positioning } from '../Positioning.js';
@@ -64,9 +65,12 @@ describe('Drawings', () => {
 
     const file = await fruitWorkbook.generateFiles();
     const dwgs = fruitWorkbook.drawings;
+    const drawingRelations = Object.values(drawings.relations.relations);
 
     expect(file).toBeTruthy();
     expect(dwgs[0].drawings.length).toBe(3);
+    expect(drawingRelations).toHaveLength(1);
+    expect(drawingRelations[0].object).toBe(picRef1);
 
     // print titles offset of 2 => left B and top 2
     fruitWorkbook.setPrintTitleLeft('sheet1', 2);
@@ -92,6 +96,13 @@ describe('Drawings', () => {
     expect(() => d.toXML()).not.toThrow();
   });
 
+  test('toXML ignores unsupported base drawings', () => {
+    const d = new Drawings();
+    d.addDrawing(new Drawing());
+
+    expect(d.toXML().documentElement.children).toHaveLength(0);
+  });
+
   test('toXML chart branch assigns relationship and appends XML', () => {
     const d = new Drawings();
     const chart = new Chart({
@@ -104,6 +115,7 @@ describe('Drawings', () => {
     d.addDrawing(chart);
     const xmlDoc = d.toXML();
     expect(chart.relId).toMatch(/^rId\d+$/);
+    expect(Object.values(d.relations.relations)[0].object).toBe(chart);
     const xmlStr = xmlDoc.toString();
     expect(xmlStr).toContain('ChartRel');
     expect(xmlStr).toContain('<c:chart '); // chart branch executed