diff --git a/examples/node/pdf2png/pdf2png.js b/examples/node/pdf2png/pdf2png.js
index 34e7b14a1..273fcd971 100644
--- a/examples/node/pdf2png/pdf2png.js
+++ b/examples/node/pdf2png/pdf2png.js
@@ -14,7 +14,7 @@
  */
 
 var Canvas = require('canvas');
-var assert = require('assert');
+var assert = require('assert').strict;
 var fs = require('fs');
 
 function NodeCanvasFactory() {}