diff --git a/index.js b/index.js
index e2f6387..8f2b62e 100644
--- a/index.js
+++ b/index.js
@@ -10,8 +10,10 @@ const processor = require('remark')
 const path = require('path')
 const fs = require('fs')
 
+const kPromise = Symbol('promise')
+
 function hallmark (options, callback) {
-  callback = fromCallback(callback)
+  callback = fromCallback(callback, kPromise)
 
   const fix = !!options.fix
   const cwd = path.resolve(options.cwd || '.')
@@ -116,7 +118,7 @@ function hallmark (options, callback) {
     })
   })
 
-  return callback.promise
+  return callback[kPromise]
 }
 
 exports.lint = function (options, callback) {
diff --git a/package.json b/package.json
index aa31b0a..103d2e8 100644
--- a/package.json
+++ b/package.json
@@ -19,7 +19,7 @@
     "USAGE"
   ],
   "dependencies": {
-    "catering": "^2.0.0",
+    "catering": "^2.1.0",
     "deglob": "^4.0.0",
     "find-file-up": "^2.0.1",
     "find-githost": "^1.0.0",