diff --git a/packages/interop/.aegir.js b/packages/interop/.aegir.js
index 498799a..35da9fa 100644
--- a/packages/interop/.aegir.js
+++ b/packages/interop/.aegir.js
@@ -12,7 +12,7 @@ export default {
           host: '127.0.0.1',
           port: ipfsdPort
         }, {
-          ipfsBin: (await import('go-ipfs')).default.path(),
+          ipfsBin: (await import('kubo')).default.path(),
           kuboRpcModule: kuboRpcClient,
           ipfsOptions: {
             config: {
diff --git a/packages/interop/package.json b/packages/interop/package.json
index 7ee17a5..c75c60f 100644
--- a/packages/interop/package.json
+++ b/packages/interop/package.json
@@ -44,7 +44,6 @@
     "test:chrome": "aegir test -t browser --cov",
     "test:chrome-webworker": "aegir test -t webworker",
     "test:firefox": "aegir test -t browser -- --browser firefox",
-    "test:firefox-webworker": "aegir test -t webworker -- --browser firefox",
     "test:node": "aegir test -t node --cov",
     "test:electron-main": "aegir test -t electron-main"
   },
@@ -58,7 +57,7 @@
     "aegir": "^41.0.0",
     "blockstore-core": "^4.0.1",
     "datastore-core": "^9.0.3",
-    "go-ipfs": "^0.22.0",
+    "kubo": "^0.24.0",
     "helia": "^2.0.1",
     "ipfs-core-types": "^0.14.0",
     "ipfs-unixfs-importer": "^15.1.0",
@@ -72,7 +71,7 @@
   },
   "browser": {
     "./dist/test/fixtures/create-helia.js": "./dist/test/fixtures/create-helia.browser.js",
-    "go-ipfs": false
+    "kubo": false
   },
   "private": true
 }
diff --git a/packages/interop/test/fixtures/create-helia.browser.ts b/packages/interop/test/fixtures/create-helia.browser.ts
index 867de49..f94bc9d 100644
--- a/packages/interop/test/fixtures/create-helia.browser.ts
+++ b/packages/interop/test/fixtures/create-helia.browser.ts
@@ -5,6 +5,7 @@ import { all } from '@libp2p/websockets/filters'
 import { MemoryBlockstore } from 'blockstore-core'
 import { MemoryDatastore } from 'datastore-core'
 import { createHelia } from 'helia'
+import { bitswap } from 'helia/block-brokers'
 import { createLibp2p, type Libp2pOptions } from 'libp2p'
 import { identifyService } from 'libp2p/identify'
 import type { Helia } from '@helia/interface'
@@ -39,7 +40,10 @@ export async function createHeliaNode (config: Libp2pOptions = {}): Promise<Heli
   const helia = await createHelia({
     libp2p,
     blockstore,
-    datastore
+    datastore,
+    blockBrokers: [
+      bitswap()
+    ]
   })
 
   return helia
diff --git a/packages/interop/test/fixtures/create-helia.ts b/packages/interop/test/fixtures/create-helia.ts
index f7a25c3..a2b769c 100644
--- a/packages/interop/test/fixtures/create-helia.ts
+++ b/packages/interop/test/fixtures/create-helia.ts
@@ -4,6 +4,7 @@ import { tcp } from '@libp2p/tcp'
 import { MemoryBlockstore } from 'blockstore-core'
 import { MemoryDatastore } from 'datastore-core'
 import { createHelia } from 'helia'
+import { bitswap } from 'helia/block-brokers'
 import { createLibp2p, type Libp2pOptions } from 'libp2p'
 import { identifyService } from 'libp2p/identify'
 import type { Helia } from '@helia/interface'
@@ -32,7 +33,10 @@ export async function createHeliaNode (config: Libp2pOptions = {}): Promise<Heli
   const helia = await createHelia({
     libp2p,
     blockstore,
-    datastore
+    datastore,
+    blockBrokers: [
+      bitswap()
+    ]
   })
 
   return helia
diff --git a/packages/interop/test/fixtures/create-kubo.ts b/packages/interop/test/fixtures/create-kubo.ts
index eea6572..a19ed1e 100644
--- a/packages/interop/test/fixtures/create-kubo.ts
+++ b/packages/interop/test/fixtures/create-kubo.ts
@@ -1,7 +1,6 @@
 /* eslint-disable @typescript-eslint/ban-ts-comment,@typescript-eslint/prefer-ts-expect-error */
-// @ts-ignore no types - TODO: remove me once the next version of npm-go-ipfs has shipped
-import * as goIpfs from 'go-ipfs'
 import { type Controller, type ControllerOptions, createController } from 'ipfsd-ctl'
+import * as goIpfs from 'kubo'
 import * as kuboRpcClient from 'kubo-rpc-client'
 import mergeOptions from 'merge-options'
 import { isElectronMain, isNode } from 'wherearewe'
diff --git a/packages/unixfs/src/utils/glob-source.ts b/packages/unixfs/src/utils/glob-source.ts
index ea19500..64078ef 100644
--- a/packages/unixfs/src/utils/glob-source.ts
+++ b/packages/unixfs/src/utils/glob-source.ts
@@ -3,6 +3,7 @@ import fsp from 'fs/promises'
 import Path from 'path'
 import glob from 'it-glob'
 import { InvalidParametersError } from '../errors.js'
+import { toMtime } from './to-mtime.js'
 import type { MtimeLike } from 'ipfs-unixfs'
 import type { ImportCandidateStream } from 'ipfs-unixfs-importer'
 
@@ -84,7 +85,7 @@ export async function * globSource (cwd: string, pattern: string, options: GlobS
       path: toPosix(p.replace(cwd, '')),
       content: stat.isFile() ? fs.createReadStream(p) : undefined,
       mode,
-      mtime
+      mtime: toMtime(mtime)
     }
   }
 }
diff --git a/packages/unixfs/src/utils/to-mtime.ts b/packages/unixfs/src/utils/to-mtime.ts
new file mode 100644
index 0000000..fd7b315
--- /dev/null
+++ b/packages/unixfs/src/utils/to-mtime.ts
@@ -0,0 +1,57 @@
+import type { Mtime, MtimeLike } from 'ipfs-unixfs'
+
+export function toMtime (mtimeLike: MtimeLike): Mtime
+export function toMtime (mtimeLike?: MtimeLike): Mtime | undefined
+export function toMtime (mtimeLike?: MtimeLike): Mtime | undefined {
+  if (mtimeLike == null) {
+    return undefined
+  }
+
+  if (isMtime(mtimeLike)) {
+    return mtimeLike
+  }
+
+  if (mtimeLike instanceof Date) {
+    return dateToTimespec(mtimeLike)
+  }
+
+  if (Array.isArray(mtimeLike)) {
+    const output: Mtime = {
+      secs: BigInt(mtimeLike[0])
+    }
+
+    if (mtimeLike.length > 1) {
+      output.nsecs = mtimeLike[1]
+    }
+
+    return output
+  }
+
+  if (typeof mtimeLike.Seconds === 'number') {
+    const output: Mtime = {
+      secs: BigInt(mtimeLike.Seconds)
+    }
+
+    if (mtimeLike.FractionalNanoseconds != null) {
+      output.nsecs = mtimeLike.FractionalNanoseconds
+    }
+
+    return output
+  }
+
+  throw new Error('Cannot convert object to mtime')
+}
+
+function dateToTimespec (date: Date): Mtime {
+  const ms = date.getTime()
+  const secs = Math.floor(ms / 1000)
+
+  return {
+    secs: BigInt(secs),
+    nsecs: (ms - (secs * 1000)) * 1000
+  }
+}
+
+function isMtime (obj: any): obj is Mtime {
+  return typeof obj.secs === 'bigint'
+}
diff --git a/packages/unixfs/test/utils/glob-source.spec.ts b/packages/unixfs/test/utils/glob-source.spec.ts
index ebb09c9..0021597 100644
--- a/packages/unixfs/test/utils/glob-source.spec.ts
+++ b/packages/unixfs/test/utils/glob-source.spec.ts
@@ -7,6 +7,8 @@ import { expect } from 'aegir/chai'
 import all from 'it-all'
 import { isNode } from 'wherearewe'
 import { globSource } from '../../src/utils/glob-source.js'
+import { toMtime } from '../../src/utils/to-mtime.js'
+import type { Mtime } from 'ipfs-unixfs'
 
 function fixtureDir (): string {
   const filename = fileURLToPath(import.meta.url)
@@ -23,8 +25,8 @@ function findMode (file: string): number {
   return fs.statSync(fixture(file)).mode
 }
 
-function findMtime (file: string): Date {
-  return fs.statSync(fixture(file)).mtime
+function findMtime (file: string): Mtime {
+  return toMtime(fs.statSync(fixture(file)).mtime)
 }
 
 describe('glob-source', () => {
@@ -228,28 +230,28 @@ describe('glob-source', () => {
     }
 
     const result = await all(globSource(fixtureDir(), '{dir,dir/**/*}', {
-      mtime: new Date(5)
+      mtime: toMtime(new Date(5))
     }))
 
     expect(result).to.have.lengthOf(6)
     expect(result).to.containSubset([{
       path: '/dir',
-      mtime: new Date(5)
+      mtime: toMtime(new Date(5))
     }, {
       path: '/dir/file-1.txt',
-      mtime: new Date(5)
+      mtime: toMtime(new Date(5))
     }, {
       path: '/dir/file-2.js',
-      mtime: new Date(5)
+      mtime: toMtime(new Date(5))
     }, {
       path: '/dir/file-3.css',
-      mtime: new Date(5)
+      mtime: toMtime(new Date(5))
     }, {
       path: '/dir/nested-dir',
-      mtime: new Date(5)
+      mtime: toMtime(new Date(5))
     }, {
       path: '/dir/nested-dir/other.txt',
-      mtime: new Date(5)
+      mtime: toMtime(new Date(5))
     }])
   })
 
@@ -274,7 +276,7 @@ describe('glob-source', () => {
       mtime: [5, 0]
     }))
 
-    expect(result).to.have.deep.nested.property('[0].mtime', [5, 0])
+    expect(result).to.have.deep.nested.property('[0].mtime', toMtime([5, 0]))
   })
 
   it('overrides mtime for file with UnixFS timespec', async function () {
@@ -286,6 +288,6 @@ describe('glob-source', () => {
       mtime: { Seconds: 5, FractionalNanoseconds: 0 }
     }))
 
-    expect(result).to.have.deep.nested.property('[0].mtime', { Seconds: 5, FractionalNanoseconds: 0 })
+    expect(result).to.have.deep.nested.property('[0].mtime', toMtime({ Seconds: 5, FractionalNanoseconds: 0 }))
   })
 })
diff --git a/packages/unixfs/test/utils/to-mtime.spec.ts b/packages/unixfs/test/utils/to-mtime.spec.ts
new file mode 100644
index 0000000..d670497
--- /dev/null
+++ b/packages/unixfs/test/utils/to-mtime.spec.ts
@@ -0,0 +1,61 @@
+/* eslint-env mocha */
+
+import { expect } from 'aegir/chai'
+import { toMtime } from '../../src/utils/to-mtime.js'
+
+describe('to-mtime', () => {
+  it('should survive undefined', async function () {
+    const result = toMtime()
+
+    expect(result).to.equal(undefined)
+  })
+
+  it('should convert a date', async function () {
+    const input = new Date()
+    const result = toMtime(input)
+
+    expect(result?.secs).to.equal(BigInt(Math.floor(input.getTime() / 1000)))
+  })
+
+  it('should convert a timespec', async function () {
+    const input = {
+      Seconds: 100
+    }
+    const result = toMtime(input)
+
+    expect(result?.secs).to.equal(BigInt(input.Seconds))
+    expect(result?.nsecs).to.be.undefined()
+  })
+
+  it('should convert a timespec with fractional nanoseconds', async function () {
+    const input = {
+      Seconds: 100,
+      FractionalNanoseconds: 5
+    }
+    const result = toMtime(input)
+
+    expect(result?.secs).to.equal(BigInt(input.Seconds))
+    expect(result?.nsecs).to.equal(input.FractionalNanoseconds)
+  })
+
+  it('should convert a mtime', async function () {
+    const input = {
+      secs: 100n
+    }
+    const result = toMtime(input)
+
+    expect(result?.secs).to.equal(input.secs)
+    expect(result?.nsecs).to.be.undefined()
+  })
+
+  it('should convert a mtime with fractional nanoseconds', async function () {
+    const input = {
+      secs: 100n,
+      nsecs: 5
+    }
+    const result = toMtime(input)
+
+    expect(result?.secs).to.equal(input.secs)
+    expect(result?.nsecs).to.equal(input.nsecs)
+  })
+})