diff --git a/memory.js b/memory.js
index d4e16c2..34ec562 100644
--- a/memory.js
+++ b/memory.js
@@ -17,7 +17,7 @@ var sink
 
 function loadSink () {
   if (sink) return sink
-  var MessageChannel = global.MessageChannel
+  var MessageChannel = globalThis.MessageChannel
   if (MessageChannel == null) ({ MessageChannel } = require('worker' + '_threads'))
   sink = new MessageChannel()
   return sink
diff --git a/randombytes.js b/randombytes.js
index f0060c0..5d6f442 100644
--- a/randombytes.js
+++ b/randombytes.js
@@ -2,7 +2,7 @@ var assert = require('nanoassert')
 
 var randombytes = (function () {
   var QUOTA = 65536 // limit for QuotaExceededException
-  var crypto = global.crypto || global.msCrypto
+  var crypto = globalThis.crypto || globalThis.msCrypto
 
   function browserBytes (out, n) {
     for (let i = 0; i < n; i += QUOTA) {