diff --git a/index.js b/index.js
index a8f7bf2..aa0a044 100644
--- a/index.js
+++ b/index.js
@@ -37,6 +37,8 @@ class PDFMerger {
   async _ensureDoc () {
     if (!this.doc) {
       this.doc = await PDFDocument.create()
+      this.doc.setProducer('pdf-merger-js')
+      this.doc.setCreationDate(new Date())
     }
   }