diff --git a/package.json b/package.json
index 924b67ba71..1bf12eb7b7 100644
--- a/package.json
+++ b/package.json
@@ -62,7 +62,7 @@
   },
   "homepage": "https://github.com/ipfs/js-ipfs#readme",
   "devDependencies": {
-    "aegir": "^17.1.1",
+    "aegir": "^18.0.3",
     "chai": "^4.2.0",
     "delay": "^4.1.0",
     "detect-node": "^2.0.4",
diff --git a/test/utils/mock-preload-node.js b/test/utils/mock-preload-node.js
index 713db9db22..60a1417654 100644
--- a/test/utils/mock-preload-node.js
+++ b/test/utils/mock-preload-node.js
@@ -19,6 +19,15 @@ module.exports.createNode = () => {
   let cids = []
 
   const server = http.createServer((req, res) => {
+    res.setHeader('Access-Control-Allow-Origin', '*')
+    res.setHeader('Access-Control-Request-Method', '*')
+    res.setHeader('Access-Control-Allow-Methods', 'OPTIONS, GET, DELETE')
+    res.setHeader('Access-Control-Allow-Headers', '*')
+    if (req.method === 'OPTIONS') {
+      res.writeHead(200)
+      res.end()
+      return
+    }
     if (req.url.startsWith('/api/v0/refs')) {
       const arg = new URL(`https://ipfs.io${req.url}`).searchParams.get('arg')
       cids = cids.concat(arg)