diff --git a/nip04.ts b/nip04.ts
index 3962f8e..3428a08 100644
--- a/nip04.ts
+++ b/nip04.ts
@@ -1,11 +1,11 @@
 import {randomBytes} from '@noble/hashes/utils'
 import * as secp256k1 from '@noble/secp256k1'
 import {base64} from '@scure/base'
-import crypto from 'crypto'
 
 import {utf8Decoder, utf8Encoder} from './utils'
 
-if (!crypto.subtle) {
+// @ts-ignore
+if (typeof(crypto) !== 'undefined' && !crypto.subtle  && crypto.webcrypto) {
   // @ts-ignore
   crypto.subtle = crypto.webcrypto.subtle
 }