diff --git a/README.md b/README.md
index effaccc..b06f8ff 100644
--- a/README.md
+++ b/README.md
@@ -50,7 +50,7 @@ Take the number of bytes, return a string abbreviated to common sizes (megabyte,
 
 #### Example
 ```ts
-import { humanFilesize } from '@bicycle-codes/util/filesize'
+import { humanFilesize } from '@substrate-system/util/filesize'
 
 const size = humanFilesize(10_000)
 console.log(size)
diff --git a/test/email.ts b/test/email.ts
index 10fee64..2642199 100644
--- a/test/email.ts
+++ b/test/email.ts
@@ -1,4 +1,4 @@
-import { test } from '@bicycle-codes/tapzero'
+import { test } from '@substrate-system/tapzero'
 import { isEmailValid } from '../src/email.js'
 
 test('isEmailValid', async t => {