diff --git a/pdf.js/viewer.js b/pdf.js/viewer.js
index 0824110..87f8762 100644
--- a/pdf.js/viewer.js
+++ b/pdf.js/viewer.js
@@ -7861,11 +7861,6 @@ window.addEventListener('keydown', function keydown(evt) {
           break;
         }
         /* falls through */
-      case 74: // 'j'
-      case 78: // 'n'
-        PDFViewerApplication.page++;
-        handled = true;
-        break;
 
       case 36: // home
         if (isViewerInPresentationMode || PDFViewerApplication.page > 1) {