diff --git a/packages/function/package.json b/packages/function/package.json
index d931a0bfb..ee1871bb0 100644
--- a/packages/function/package.json
+++ b/packages/function/package.json
@@ -30,7 +30,7 @@
   ],
   "dependencies": {
     "@browserless/errors": "^10.9.7",
-    "isolated-function": "~0.1.46",
+    "isolated-function": "~0.1.47",
     "require-one-of": "~1.0.24"
   },
   "devDependencies": {
diff --git a/packages/function/src/function.js b/packages/function/src/function.js
index 57f361569..7e3d6ffd1 100644
--- a/packages/function/src/function.js
+++ b/packages/function/src/function.js
@@ -7,8 +7,12 @@ const [nodeMajor] = process.version.slice(1).split('.').map(Number)
 
 module.exports = async ({ url, code, vmOpts, browserWSEndpoint, ...opts }) => {
   const needsNetwork = template.isUsingPage(code)
-  const allow = needsNetwork && nodeMajor >= 25 ? ['net'] : []
-  const [fn, teardown] = isolatedFunction(template(code), { ...vmOpts, allow, throwError: false })
+  const permissions = needsNetwork && nodeMajor >= 25 ? ['net'] : []
+  const [fn, teardown] = isolatedFunction(template(code), {
+    ...vmOpts,
+    allow: { permissions },
+    throwError: false
+  })
   const result = await fn(url, browserWSEndpoint, opts)
   await teardown()
   return result