diff --git a/README.md b/README.md
index 495af47..55e3c40 100644
--- a/README.md
+++ b/README.md
@@ -30,7 +30,7 @@ or for use without any build tools:
 <script type="module">
   import {
     LN /* or NWCClient, or NostrWebLNProvider */,
-  } from "https://esm.sh/@getalby/sdk@8.0.1"; // jsdelivr.net, skypack.dev also work
+  } from "https://esm.sh/@getalby/sdk@8.0.2"; // jsdelivr.net, skypack.dev also work
 
   // ... then use the SDK as normal (see below)
 </script>
diff --git a/examples/lnclient/paywall-esm.html b/examples/lnclient/paywall-esm.html
index 12cfc9d..e27de3d 100644
--- a/examples/lnclient/paywall-esm.html
+++ b/examples/lnclient/paywall-esm.html
@@ -1,5 +1,5 @@
 <script type="module">
-  import { LN, USD } from "https://esm.sh/@getalby/sdk@8.0.1"; // jsdelivr.net, skypack.dev also work
+  import { LN, USD } from "https://esm.sh/@getalby/sdk@8.0.2"; // jsdelivr.net, skypack.dev also work
   const connectionSecret = prompt("Enter a read-only connection secret");
   const client = new LN(connectionSecret);
 
diff --git a/examples/nwc/auth.html b/examples/nwc/auth.html
index 5fe8816..66cbe7a 100644
--- a/examples/nwc/auth.html
+++ b/examples/nwc/auth.html
@@ -1,5 +1,5 @@
 <script type="module">
-  import { NostrWebLNProvider } from "https://esm.sh/@getalby/sdk@8.0.1"; // jsdelivr.net, skypack.dev also work
+  import { NostrWebLNProvider } from "https://esm.sh/@getalby/sdk@8.0.2"; // jsdelivr.net, skypack.dev also work
   window.launchNwc = async () => {
     try {
       const authUrl = prompt("Auth URL", "https://my.albyhub.com/apps/new");
diff --git a/examples/nwc/auth_manual.html b/examples/nwc/auth_manual.html
index 2223a0c..0072f64 100644
--- a/examples/nwc/auth_manual.html
+++ b/examples/nwc/auth_manual.html
@@ -5,7 +5,7 @@
   import {
     NostrWebLNProvider,
     NWCClient,
-  } from "https://esm.sh/@getalby/sdk@8.0.1"; // jsdelivr.net, skypack.dev also work
+  } from "https://esm.sh/@getalby/sdk@8.0.2"; // jsdelivr.net, skypack.dev also work
   import {
     generateSecretKey,
     getPublicKey,
diff --git a/examples/nwc/client/auth.html b/examples/nwc/client/auth.html
index 4811ebd..112ac33 100644
--- a/examples/nwc/client/auth.html
+++ b/examples/nwc/client/auth.html
@@ -1,5 +1,5 @@
 <script type="module">
-  import { NWCClient } from "https://esm.sh/@getalby/sdk@8.0.1"; // jsdelivr.net, skypack.dev also work
+  import { NWCClient } from "https://esm.sh/@getalby/sdk@8.0.2"; // jsdelivr.net, skypack.dev also work
 
   window.launchNwc = async () => {
     try {
diff --git a/examples/nwc/client/auth_manual.html b/examples/nwc/client/auth_manual.html
index 254ca9d..ff89533 100644
--- a/examples/nwc/client/auth_manual.html
+++ b/examples/nwc/client/auth_manual.html
@@ -2,7 +2,7 @@
 <button id="reset-button" onclick="window.resetNwc()">Reset</button>
 
 <script type="module">
-  import { NWCClient } from "https://esm.sh/@getalby/sdk@8.0.1"; // jsdelivr.net, skypack.dev also work
+  import { NWCClient } from "https://esm.sh/@getalby/sdk@8.0.2"; // jsdelivr.net, skypack.dev also work
   import {
     generateSecretKey,
     getPublicKey,
diff --git a/src/utils.ts b/src/utils.ts
index b1c2052..f85b594 100644
--- a/src/utils.ts
+++ b/src/utils.ts
@@ -1,4 +1,3 @@
-import crypto from "crypto";
 // from https://stackoverflow.com/a/50868276
 const toHexString = (bytes: Uint8Array<ArrayBuffer>) =>
   bytes.reduce((str, byte) => str + byte.toString(16).padStart(2, "0"), "");
@@ -7,11 +6,11 @@ async function generatePreimageAndPaymentHash(): Promise<{
   preimage: string;
   paymentHash: string;
 }> {
-  const preimageBytes = crypto.randomBytes(32);
+  const preimageBytes = crypto.getRandomValues(new Uint8Array(32));
   const preimage = toHexString(preimageBytes);
 
-  const hashBuffer = crypto.createHash("sha256").update(preimageBytes).digest();
-  const paymentHash = toHexString(hashBuffer);
+  const hashBuffer = await crypto.subtle.digest("SHA-256", preimageBytes);
+  const paymentHash = toHexString(new Uint8Array(hashBuffer));
 
   return { preimage, paymentHash };
 }