diff --git a/index.js b/index.js
index ca3e8c2..f21dbb3 100644
--- a/index.js
+++ b/index.js
@@ -3,7 +3,6 @@
 const compressible = require('compressible')
 const toArray = require('stream-to-array')
 const isJSON = require('koa-is-json')
-const Bluebird = require('bluebird')
 const bytes = require('bytes')
 const co = require('co')
 
diff --git a/package.json b/package.json
index 56ff679..b843161 100644
--- a/package.json
+++ b/package.json
@@ -3,7 +3,6 @@
   "description": "HTTP response caching for Koa",
   "version": "2.1.1",
   "dependencies": {
-    "bluebird": "^3.1.1",
     "bytes": "^2.1.0",
     "co": "^4.4.0",
     "compressible": "^2.0.0",