diff --git a/index.js b/index.js
index a9ba432d..073d1c9b 100644
--- a/index.js
+++ b/index.js
@@ -8,7 +8,7 @@ import junk from 'junk'
 import joinIterator from 'join-async-iterator'
 import parallel from 'run-parallel'
 import queueMicrotask from 'queue-microtask'
-import sha1 from 'simple-sha1'
+import { sha1 } from 'uint8-util'
 import 'fast-readable-async-iterator'
 
 import getFiles from './get-files.js' // browser exclude
diff --git a/package.json b/package.json
index 0128a7a3..83c223a1 100644
--- a/package.json
+++ b/package.json
@@ -29,7 +29,7 @@
     "piece-length": "^2.0.1",
     "queue-microtask": "^1.2.3",
     "run-parallel": "^1.2.0",
-    "simple-sha1": "^3.1.0"
+    "uint8-util": "^1.0.1"
   },
   "devDependencies": {
     "@webtorrent/semantic-release-config": "1.0.8",
diff --git a/test/browser/basic.js b/test/browser/basic.js
index 5371c011..edf93a8a 100644
--- a/test/browser/basic.js
+++ b/test/browser/basic.js
@@ -4,7 +4,7 @@ import fixtures from 'webtorrent-fixtures'
 import fs from 'fs'
 import parseTorrent from 'parse-torrent'
 import path from 'path'
-import sha1 from 'simple-sha1'
+import { sha1 } from 'uint8-util'
 import test from 'tape'
 import createTorrent from '../../index.js'
 
@@ -71,7 +71,9 @@ test('create single file torrent', t => {
     ])
 
     window.parsedTorrent = parsedTorrent
-    t.equals(sha1.sync(parsedTorrent.infoBuffer), 'd2474e86c95b19b8bcfdb92bc12c9d44667cfa36')
+    sha1(parsedTorrent.infoBuffer, hash => {
+      t.equals(hash, 'd2474e86c95b19b8bcfdb92bc12c9d44667cfa36')
+    })
   })
 })
 
@@ -117,7 +119,8 @@ test('create multi file torrent', t => {
     t.deepEquals(parsedTorrent.pieces, [
       '1f74648e50a6a6708ec54ab327a163d5536b7ced'
     ])
-
-    t.equals(sha1.sync(parsedTorrent.infoBuffer), '80562f38656b385ea78959010e51a2cc9db41ea0')
+    sha1(parsedTorrent.infoBuffer, hash => {
+      t.equals(hash, '80562f38656b385ea78959010e51a2cc9db41ea0')
+    })
   })
 })
diff --git a/test/browser/directory.js b/test/browser/directory.js
index d2a1e979..d409e831 100644
--- a/test/browser/directory.js
+++ b/test/browser/directory.js
@@ -3,7 +3,7 @@
 import fs from 'fs'
 import parseTorrent from 'parse-torrent'
 import path from 'path'
-import sha1 from 'simple-sha1'
+import { sha1 } from 'uint8-util'
 import test from 'tape'
 import createTorrent from '../../index.js'
 
diff --git a/test/buffer.js b/test/buffer.js
index ccb9be0a..57ae8abd 100644
--- a/test/buffer.js
+++ b/test/buffer.js
@@ -1,7 +1,7 @@
 import createTorrent from '../index.js'
 import parseTorrent from 'parse-torrent'
 import path from 'path'
-import sha1 from 'simple-sha1'
+import { sha1 } from 'uint8-util'
 import test from 'tape'
 
 test('create nested torrent with array of buffers', t => {
@@ -42,6 +42,8 @@ test('create nested torrent with array of buffers', t => {
     t.deepEquals(parsedTorrent.pieces, [
       '5bf1fd927dfb8679496a2e6cf00cbe50c1c87145'
     ])
-    t.equals(sha1.sync(parsedTorrent.infoBuffer), '8fa3c08e640db9576156b21f31353402456a0208')
+    sha1(parsedTorrent.infoBuffer, hash => {
+      t.equals(hash, '8fa3c08e640db9576156b21f31353402456a0208')
+    })
   })
 })
diff --git a/test/fs.js b/test/fs.js
index 4c28aebe..bfd35b77 100644
--- a/test/fs.js
+++ b/test/fs.js
@@ -1,7 +1,7 @@
 import fixtures from 'webtorrent-fixtures'
 import parseTorrent from 'parse-torrent'
 import path from 'path'
-import sha1 from 'simple-sha1'
+import { sha1 } from 'uint8-util'
 import test from 'tape'
 import createTorrent from '../index.js'
 
@@ -54,7 +54,9 @@ test('create single file torrent', t => {
       'c698de9b0dad92980906c026d8c1408fa08fe4ec'
     ])
 
-    t.equals(sha1.sync(parsedTorrent.infoBuffer), 'd2474e86c95b19b8bcfdb92bc12c9d44667cfa36')
+    sha1(parsedTorrent.infoBuffer, hash => {
+      t.equals(hash, 'd2474e86c95b19b8bcfdb92bc12c9d44667cfa36')
+    })
   })
 })
 
@@ -112,7 +114,9 @@ test('create multi file torrent', t => {
     t.deepEquals(parsedTorrent.pieces, [
       '1f74648e50a6a6708ec54ab327a163d5536b7ced'
     ])
-    t.equals(sha1.sync(parsedTorrent.infoBuffer), '80562f38656b385ea78959010e51a2cc9db41ea0')
+    sha1(parsedTorrent.infoBuffer, hash => {
+      t.equals(hash, '80562f38656b385ea78959010e51a2cc9db41ea0')
+    })
   })
 })
 
@@ -165,8 +169,9 @@ test('create multi file torrent with nested directories', t => {
     t.deepEquals(parsedTorrent.pieces, [
       '47972f2befaee58b6f3860cd39bd56cb33a488f0'
     ])
-
-    t.equals(sha1.sync(parsedTorrent.infoBuffer), '427887e9c03e123f9c8458b1947090edf1c75baa')
+    sha1(parsedTorrent.infoBuffer, hash => {
+      t.equals(hash, '427887e9c03e123f9c8458b1947090edf1c75baa')
+    })
   })
 })
 
@@ -225,6 +230,8 @@ test('create multi file torrent with array of paths', t => {
     t.deepEquals(parsedTorrent.pieces, [
       '1c4e1ba6da4d771ff82025d7cf76e8c368c6c3dd'
     ])
-    t.equals(sha1.sync(parsedTorrent.infoBuffer), 'df25a2959378892f6ddaf4a2d7e75174e09878bb')
+    sha1(parsedTorrent.infoBuffer, hash => {
+      t.equals(hash, 'df25a2959378892f6ddaf4a2d7e75174e09878bb')
+    })
   })
 })
diff --git a/test/mixed.js b/test/mixed.js
index b3b620fa..e555731b 100644
--- a/test/mixed.js
+++ b/test/mixed.js
@@ -2,7 +2,7 @@ import fixtures from 'webtorrent-fixtures'
 import fs from 'fs'
 import parseTorrent from 'parse-torrent'
 import path from 'path'
-import sha1 from 'simple-sha1'
+import { sha1 } from 'uint8-util'
 import test from 'tape'
 import createTorrent from '../index.js'
 
@@ -65,6 +65,8 @@ test('create multi file torrent with array of mixed types', t => {
     t.deepEquals(parsedTorrent.pieces, [
       '9ad893bb9aeca601a0fab4ba85bd4a4c18b630e3'
     ])
-    t.equals(sha1.sync(parsedTorrent.infoBuffer), 'bad3f8ea0d1d8a55c18a039dd464f1078f83dba2')
+    sha1(parsedTorrent.infoBuffer, hash => {
+      t.equals(hash, 'bad3f8ea0d1d8a55c18a039dd464f1078f83dba2')
+    })
   })
 })
diff --git a/test/source.js b/test/source.js
index 9888f0f5..85dfbc1c 100644
--- a/test/source.js
+++ b/test/source.js
@@ -1,7 +1,7 @@
 import { join } from 'path'
 import fixtures from 'webtorrent-fixtures'
 import parseTorrent from 'parse-torrent'
-import sha1 from 'simple-sha1'
+import { sha1 } from 'uint8-util'
 import test from 'tape'
 
 import createTorrent from '../index.js'
@@ -36,8 +36,9 @@ test('verify info-hash without no source set (default)', t => {
     t.equal(parsedTorrent.pieceLength, 262144)
 
     t.deepEquals(parsedTorrent.pieces, ['799c11e348d39f1704022b8354502e2f81f3c037'])
-
-    t.equals(sha1.sync(parsedTorrent.infoBuffer), 'b4dfce1f956f720c928535ded617d07696a819ef', 'mktorrent hash with no source')
+    sha1(parsedTorrent.infoBuffer, hash => {
+      t.equals(hash, 'b4dfce1f956f720c928535ded617d07696a819ef', 'mktorrent hash with no source')
+    })
   })
 })
 
@@ -72,7 +73,8 @@ test('verify info-hash an additional source attribute set on the info dict (a wa
     t.equal(parsedTorrent.pieceLength, 262144)
 
     t.deepEquals(parsedTorrent.pieces, ['799c11e348d39f1704022b8354502e2f81f3c037'])
-
-    t.equals(sha1.sync(parsedTorrent.infoBuffer), 'a9499b56289356a3d5b8636387deb83709b8fa42', 'mktorrent run with -s SOURCE')
+    sha1(parsedTorrent.infoBuffer, hash => {
+      t.equals(hash, 'a9499b56289356a3d5b8636387deb83709b8fa42', 'mktorrent run with -s SOURCE')
+    })
   })
 })
diff --git a/test/stream.js b/test/stream.js
index d8449957..a897b0bd 100644
--- a/test/stream.js
+++ b/test/stream.js
@@ -2,7 +2,7 @@ import fixtures from 'webtorrent-fixtures'
 import fs from 'fs'
 import parseTorrent from 'parse-torrent'
 import path from 'path'
-import sha1 from 'simple-sha1'
+import { sha1 } from 'uint8-util'
 import test from 'tape'
 import createTorrent from '../index.js'
 
@@ -57,8 +57,9 @@ test('create single file torrent from a stream', t => {
       '56dcc242d03293e9446cf5e457d8eb3d9588fd90',
       'c698de9b0dad92980906c026d8c1408fa08fe4ec'
     ])
-
-    t.equals(sha1.sync(parsedTorrent.infoBuffer), 'd2474e86c95b19b8bcfdb92bc12c9d44667cfa36')
+    sha1(parsedTorrent.infoBuffer, hash => {
+      t.equals(hash, 'd2474e86c95b19b8bcfdb92bc12c9d44667cfa36')
+    })
   })
 })
 
@@ -111,7 +112,9 @@ test('create multi file torrent with streams', t => {
     t.deepEquals(parsedTorrent.pieces, [
       '1f74648e50a6a6708ec54ab327a163d5536b7ced'
     ])
-    t.equals(sha1.sync(parsedTorrent.infoBuffer), '80562f38656b385ea78959010e51a2cc9db41ea0')
+    sha1(parsedTorrent.infoBuffer, hash => {
+      t.equals(hash, '80562f38656b385ea78959010e51a2cc9db41ea0')
+    })
   })
 })