diff --git a/packages/signing/addDigitalSignature.ts b/packages/signing/addDigitalSignature.ts
index 569fa63db..f38a85cb4 100644
--- a/packages/signing/addDigitalSignature.ts
+++ b/packages/signing/addDigitalSignature.ts
@@ -1,4 +1,5 @@
 const fs = require("fs");
+// Local copy of Node SignPDF because https://github.com/vbuch/node-signpdf/pull/187 was not published in NPM yet. Can be switched to npm packge.
 const signer = require("./node-signpdf/dist/signpdf");
 import {
   PDFDocument,