diff --git a/PDFMergerBase.js b/PDFMergerBase.js
index ffea128..f511357 100644
--- a/PDFMergerBase.js
+++ b/PDFMergerBase.js
@@ -1,4 +1,5 @@
 import { PDFDocument } from 'pdf-lib'
+import fetch from 'node-fetch'
 
 import { parsePagesString } from './parsePagesString.js'