diff --git a/package.json b/package.json
index fd29317..3ea6ef2 100644
--- a/package.json
+++ b/package.json
@@ -143,10 +143,9 @@
     "docs": "aegir docs"
   },
   "dependencies": {
-    "@libp2p/interfaces": "^3.0.2",
+    "@libp2p/interfaces": "^3.2.0",
     "@libp2p/logger": "^2.0.0",
     "abortable-iterator": "^4.0.2",
-    "err-code": "^3.0.1",
     "it-first": "^2.0.0",
     "it-handshake": "^4.1.2",
     "it-length-prefixed": "^8.0.3",
diff --git a/src/multistream.ts b/src/multistream.ts
index 7d33914..cd2b932 100644
--- a/src/multistream.ts
+++ b/src/multistream.ts
@@ -2,7 +2,7 @@
 import { Uint8ArrayList } from 'uint8arraylist'
 import * as lp from 'it-length-prefixed'
 import { pipe } from 'it-pipe'
-import errCode from 'err-code'
+import { CodeError } from '@libp2p/interfaces/errors'
 import { fromString as uint8ArrayFromString } from 'uint8arrays/from-string'
 import first from 'it-first'
 import { abortableSource } from 'abortable-iterator'
@@ -82,12 +82,12 @@ export async function read (reader: Reader, options?: AbortOptions): Promise<Uin
   )
 
   if (buf == null || buf.length === 0) {
-    throw errCode(new Error('no buffer returned'), 'ERR_INVALID_MULTISTREAM_SELECT_MESSAGE')
+    throw new CodeError('no buffer returned', 'ERR_INVALID_MULTISTREAM_SELECT_MESSAGE')
   }
 
   if (buf.get(buf.byteLength - 1) !== NewLine[0]) {
     log.error('Invalid mss message - missing newline - %s', buf.subarray())
-    throw errCode(new Error('missing newline'), 'ERR_INVALID_MULTISTREAM_SELECT_MESSAGE')
+    throw new CodeError('missing newline', 'ERR_INVALID_MULTISTREAM_SELECT_MESSAGE')
   }
 
   return buf.sublist(0, -1) // Remove newline
diff --git a/src/select.ts b/src/select.ts
index 702e5ce..d45244f 100644
--- a/src/select.ts
+++ b/src/select.ts
@@ -1,5 +1,5 @@
 import { logger } from '@libp2p/logger'
-import errCode from 'err-code'
+import { CodeError } from '@libp2p/interfaces/errors'
 import * as multistream from './multistream.js'
 import { handshake } from 'it-handshake'
 import { fromString as uint8ArrayFromString } from 'uint8arrays/from-string'
@@ -102,7 +102,7 @@ export async function select (stream: Duplex<any>, protocols: string | string[],
   }
 
   rest()
-  throw errCode(new Error('protocol selection failed'), 'ERR_UNSUPPORTED_PROTOCOL')
+  throw new CodeError('protocol selection failed', 'ERR_UNSUPPORTED_PROTOCOL')
 }
 
 /**
@@ -147,7 +147,7 @@ export function lazySelect (stream: Duplex<any>, protocol: string): ProtocolStre
           response = await multistream.readString(byteReader)
         }
         if (response !== protocol) {
-          throw errCode(new Error('protocol selection failed'), 'ERR_UNSUPPORTED_PROTOCOL')
+          throw new CodeError('protocol selection failed', 'ERR_UNSUPPORTED_PROTOCOL')
         }
         for await (const chunk of byteReader) {
           yield * chunk