diff --git a/nifti.js b/nifti.js
index fd7c907..dfbcbcb 100644
--- a/nifti.js
+++ b/nifti.js
@@ -1,5 +1,4 @@
 "use strict"
-var assert = require('assert')
 
 var systemEndianness = (function() {
     var buf = new ArrayBuffer(4),