diff --git a/package.json b/package.json
index fcadee5..0fb7dc4 100644
--- a/package.json
+++ b/package.json
@@ -28,6 +28,7 @@
     "hexo-renderer-stylus": "^2.0.0",
     "hexo-server": "^3.0.0",
     "hexo-tag-aplayer": "^3.0.4",
+    "hexo-clean-css": "2.0.0",
     "hexo-theme-amane": "0.0.19",
     "hexo-theme-icarus": "5.2.1",
     "inferno": "^8.0.1",