diff --git a/packages/gossipsub/.aegir.js b/packages/gossipsub/.aegir.js
index b3d7d69e84..45c4d2a7f8 100644
--- a/packages/gossipsub/.aegir.js
+++ b/packages/gossipsub/.aegir.js
@@ -1,6 +1,6 @@
 /** @type {import('aegir').PartialOptions} */
 export default {
   build: {
-    bundlesizeMax: '85KB'
+    bundlesizeMax: '62KB'
   }
 }
diff --git a/packages/gossipsub/package.json b/packages/gossipsub/package.json
index 40aa7f8b8a..dc8a2e4569 100644
--- a/packages/gossipsub/package.json
+++ b/packages/gossipsub/package.json
@@ -43,6 +43,7 @@
   },
   "scripts": {
     "lint": "aegir lint",
+    "dep-check": "aegir dep-check",
     "release": "aegir release --no-types",
     "build": "aegir build",
     "generate": "protons ./src/message/rpc.proto",
@@ -75,7 +76,7 @@
     "@libp2p/interface": "^3.1.0",
     "@libp2p/interface-internal": "^3.0.9",
     "@libp2p/peer-id": "^6.0.4",
-    "@libp2p/pubsub": "^10.0.0",
+    "@libp2p/utils": "^7.0.9",
     "@multiformats/multiaddr": "^13.0.1",
     "denque": "^2.1.0",
     "it-length-prefixed": "^10.0.1",
@@ -90,7 +91,6 @@
     "@chainsafe/as-sha256": "^1.2.0",
     "@dapplion/benchmark": "^1.0.0",
     "@libp2p/floodsub": "^11.0.10",
-    "@libp2p/interface-compliance-tests": "^7.0.10",
     "@libp2p/logger": "^6.2.2",
     "@libp2p/peer-store": "^12.0.9",
     "@types/node": "^22.18.1",
diff --git a/packages/gossipsub/src/utils/msgIdFn.ts b/packages/gossipsub/src/utils/msgIdFn.ts
index 59b00e749a..7dc4b2da5f 100644
--- a/packages/gossipsub/src/utils/msgIdFn.ts
+++ b/packages/gossipsub/src/utils/msgIdFn.ts
@@ -1,6 +1,22 @@
-import { msgId } from '@libp2p/pubsub/utils'
+import { publicKeyToProtobuf } from '@libp2p/crypto/keys'
 import { sha256 } from 'multiformats/hashes/sha2'
+import { fromString as uint8ArrayFromString } from 'uint8arrays/from-string'
 import type { Message } from '../index.js'
+import type { PublicKey } from '@libp2p/interface'
+
+/**
+ * Generate a message id, based on the `key` and `seqno`
+ */
+export const msgId = (key: PublicKey, seqno: bigint): Uint8Array => {
+  const seqnoBytes = uint8ArrayFromString(seqno.toString(16).padStart(16, '0'), 'base16')
+  const keyBytes = publicKeyToProtobuf(key)
+
+  const msgId = new Uint8Array(keyBytes.byteLength + seqnoBytes.length)
+  msgId.set(keyBytes, 0)
+  msgId.set(seqnoBytes, keyBytes.byteLength)
+
+  return msgId
+}
 
 /**
  * Generate a message id, based on the `key` and `seqno`
diff --git a/packages/gossipsub/test/message-cache.spec.ts b/packages/gossipsub/test/message-cache.spec.ts
index e3f76d1538..3ad8f8a23c 100644
--- a/packages/gossipsub/test/message-cache.spec.ts
+++ b/packages/gossipsub/test/message-cache.spec.ts
@@ -1,12 +1,17 @@
-import * as utils from '@libp2p/pubsub/utils'
+import { randomBytes } from '@libp2p/crypto'
 import { expect } from 'aegir/chai'
 import { fromString as uint8ArrayFromString } from 'uint8arrays/from-string'
+import { toString as uint8ArrayToString } from 'uint8arrays/to-string'
 import { MessageCache } from '../src/message-cache.js'
 import { messageIdToString } from '../src/utils/messageIdToString.js'
 import { getMsgId } from './utils/index.js'
 import type { RPC } from '../src/message/rpc.js'
 import type { MessageId } from '../src/types.js'
 
+function randomSeqno (): bigint {
+  return BigInt(`0x${uint8ArrayToString(randomBytes(8), 'base16')}`)
+}
+
 const toMessageId = (msgId: Uint8Array): MessageId => {
   return {
     msgId,
@@ -28,7 +33,7 @@ describe('Testing Message Cache Operations', () => {
       return {
         from: new Uint8Array(0),
         data: uint8ArrayFromString(n.toString()),
-        seqno: uint8ArrayFromString(utils.randomSeqno().toString(16).padStart(16, '0'), 'base16'),
+        seqno: uint8ArrayFromString(randomSeqno().toString(16).padStart(16, '0'), 'base16'),
         topic
       }
     }