diff --git a/extension/background.js b/extension/background.js
index bd18738..f789dea 100644
--- a/extension/background.js
+++ b/extension/background.js
@@ -1,5 +1,4 @@
 import browser from 'webextension-polyfill'
-import {Buffer} from 'buffer'
 import {validateEvent, signEvent, getEventHash, getPublicKey} from 'nostr-tools'
 import {encrypt, decrypt} from 'nostr-tools/nip04'
 
@@ -56,7 +55,7 @@ async function handleContentScriptMessage({type, params, host}) {
   try {
     switch (type) {
       case 'getPublicKey': {
-        return Buffer.from(getPublicKey(sk)).toString('hex')
+        return getPublicKey(sk)
       }
       case 'getRelays': {
         let results = await browser.storage.local.get('relays')
@@ -65,14 +64,13 @@ async function handleContentScriptMessage({type, params, host}) {
       case 'signEvent': {
         let {event} = params
 
-        if (!event.pubkey)
-          event.pubkey = Buffer.from(getPublicKey(sk)).toString('hex')
+        if (!event.pubkey) event.pubkey = getPublicKey(sk)
         if (!event.id) event.id = getEventHash(event)
 
         if (!validateEvent(event)) return {error: 'invalid event'}
 
         let signature = await signEvent(event, sk)
-        return Buffer.from(signature).toString('hex')
+        return signature
       }
       case 'nip04.encrypt': {
         let {peer, plaintext} = params
diff --git a/extension/popup.jsx b/extension/popup.jsx
index 54fec4f..fd1ed68 100644
--- a/extension/popup.jsx
+++ b/extension/popup.jsx
@@ -1,5 +1,4 @@
 import browser from 'webextension-polyfill'
-import {Buffer} from 'buffer'
 import {render} from 'react-dom'
 import {getPublicKey} from 'nostr-tools'
 import React, {useState, useEffect} from 'react'
@@ -10,7 +9,7 @@ function Popup() {
   useEffect(() => {
     browser.storage.local.get('private_key').then(results => {
       if (results.private_key) {
-        setKey(Buffer.from(getPublicKey(results.private_key)).toString('hex'))
+        setKey(getPublicKey(results.private_key))
       } else {
         setKey(null)
       }
diff --git a/package.json b/package.json
index c0afab9..9f758b6 100644
--- a/package.json
+++ b/package.json
@@ -7,7 +7,7 @@
     "eslint-plugin-babel": "^5.3.1",
     "eslint-plugin-react": "^7.28.0",
     "events": "^3.3.0",
-    "nostr-tools": "^0.21.4",
+    "nostr-tools": "^0.22.1",
     "prettier": "^2.5.1",
     "react": "^17.0.2",
     "react-dom": "^17.0.2",
diff --git a/yarn.lock b/yarn.lock
index e0b8ffb..447862f 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -41,11 +41,16 @@
   resolved "https://registry.yarnpkg.com/@noble/hashes/-/hashes-0.5.9.tgz#9f3051a4cc6f7c168022b3b7fbbe9fe2a35cccf0"
   integrity sha512-7lN1Qh6d8DUGmfN36XRsbN/WcGIPNtTGhkw26vWId/DlCIGsYJJootTtPGghTLcn/AaXPx2Q0b3cacrwXa7OVw==
 
-"@noble/secp256k1@^1.3.0", "@noble/secp256k1@^1.3.4":
+"@noble/secp256k1@^1.3.4":
   version "1.4.0"
   resolved "https://registry.yarnpkg.com/@noble/secp256k1/-/secp256k1-1.4.0.tgz#b6b1529552c38e42908a88e39ac691598e741cf9"
   integrity sha512-cYpUbQ2uitPgf5QuQnpi8Nu+ZmQjSDunFKw6vvxaOSkbMUhCf4K723WLUuuK1K/sf6H/dvqKbmEAeop5i3qTJg==
 
+"@noble/secp256k1@^1.5.2":
+  version "1.5.3"
+  resolved "https://registry.yarnpkg.com/@noble/secp256k1/-/secp256k1-1.5.3.tgz#887fa88d72f5caa1b7300873e8d4c9eaca029cec"
+  integrity sha512-v11x6HReQymMELBq2fnwVthQMOPB5911fwem9515TLiNlitdOuS2qEMa1BzTcDgB563ql0238JGrpJJA1IaJ8Q==
+
 acorn-jsx@^5.3.1:
   version "5.3.2"
   resolved "https://registry.yarnpkg.com/acorn-jsx/-/acorn-jsx-5.3.2.tgz#7ed5bb55908b3b2f1bc55c6af1653bada7f07937"
@@ -1062,13 +1067,13 @@ node-gyp-build@^4.3.0:
   resolved "https://registry.yarnpkg.com/node-gyp-build/-/node-gyp-build-4.3.0.tgz#9f256b03e5826150be39c764bf51e993946d71a3"
   integrity sha512-iWjXZvmboq0ja1pUGULQBexmxq8CV4xBhX7VDOTbL7ZR4FOowwY/VOtRxBN/yKxmdGoIp4j5ysNT4u3S2pDQ3Q==
 
-nostr-tools@^0.21.4:
-  version "0.21.4"
-  resolved "https://registry.yarnpkg.com/nostr-tools/-/nostr-tools-0.21.4.tgz#c9cb88955ee55ab751287aa4e492708221748d86"
-  integrity sha512-ZCYRMfryb2loOFm3WGG5dXPGCJP3OqanNur6q1moZUMKhzDOzb3d95yVBa752LF9cReTjjxyIoZm0TklEAaeAA==
+nostr-tools@^0.22.1:
+  version "0.22.1"
+  resolved "https://registry.yarnpkg.com/nostr-tools/-/nostr-tools-0.22.1.tgz#ad4048d8e9b6d3d658bbe2a0753f75a84c860f2b"
+  integrity sha512-uGSp246JlqjiHQr2RahfOxvSJ4jGPgqKjiyb/YkEM55CriVVF1ISNmpfc7bFchIvPSFhWoWouGqXwqNpoHXdbw==
   dependencies:
     "@noble/hashes" "^0.5.7"
-    "@noble/secp256k1" "^1.3.0"
+    "@noble/secp256k1" "^1.5.2"
     browserify-cipher ">=1"
     buffer ">=5"
     create-hash "^1.2.0"