diff --git a/lib/filter.js b/lib/filter.js
index 87297b0..5856c76 100644
--- a/lib/filter.js
+++ b/lib/filter.js
@@ -3,7 +3,6 @@
 const CleanCSS = require('clean-css')
 const Terser = require('terser')
 const Htmlminifier = require('html-minifier').minify
-const Promise = require('bluebird')
 const minimatch = require('minimatch')
 const zlib = require('zlib')
 const br = require('iltorb')
diff --git a/package.json b/package.json
index 3ffb6d6..e5098b1 100644
--- a/package.json
+++ b/package.json
@@ -18,7 +18,6 @@
     "url": "https://github.com/weyusi/hexo-yam.git"
   },
   "dependencies": {
-    "bluebird": "^3.5.4",
     "clean-css": "^4.2.1",
     "html-minifier": "^4.0.0",
     "iltorb": "^2.4.2",