diff --git a/.travis.yml b/.travis.yml
index 3496ce5..f69289c 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,6 +1,6 @@
 node_js:
-- "0.10"
-- "0.11"
+- "4"
+- "9"
 sudo: false
 language: node_js
 script: "npm run test-cov"
diff --git a/index.js b/index.js
index f33c045..387d52b 100644
--- a/index.js
+++ b/index.js
@@ -1,5 +1,4 @@
 const assert  = require('assert')
-const Promise = require('any-promise')
 
 module.exports = reduce
 
diff --git a/package-lock.json b/package-lock.json
new file mode 100644
index 0000000..9ae51a0
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,1439 @@
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+      "dev": true,
+      "optional": true,
+      "requires": {
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+}
diff --git a/package.json b/package.json
index f73103d..1495343 100644
--- a/package.json
+++ b/package.json
@@ -16,9 +16,6 @@
     "reduce"
   ],
   "license": "MIT",
-  "dependencies": {
-    "any-promise": "^0.1.0"
-  },
   "devDependencies": {
     "bluebird": "^2.8.2",
     "eslint": "^0.12.0",
@@ -31,5 +28,8 @@
     "LICENSE",
     "README.md",
     "index.js"
-  ]
+  ],
+  "engines": {
+    "node": ">=4"
+  }
 }
diff --git a/test.js b/test.js
index e5790d3..93fe4c9 100644
--- a/test.js
+++ b/test.js
@@ -1,6 +1,5 @@
 const test    = require('tape')
 const reduce     = require('./')
-const Promise = require('any-promise')
 
 test('promise-reduce should assert input types', function (t) {
   t.plan(1)