diff --git a/packages/saber/package.json b/packages/saber/package.json
index 6d8f516e1..23def0b46 100644
--- a/packages/saber/package.json
+++ b/packages/saber/package.json
@@ -29,7 +29,7 @@
     "cac": "^6.4.3",
     "chokidar": "^2.0.4",
     "css-loader": "^2.1.0",
-    "cssnano": "^4.1.8",
+    "cssnano": "^5.0.0",
     "fast-deep-equal": "^2.0.1",
     "file-loader": "^3.0.1",
     "hash-sum": "^1.0.2",