diff --git a/packages/astro-htmlnano/package.json b/packages/astro-htmlnano/package.json
index 6e0eff7..f8d9684 100644
--- a/packages/astro-htmlnano/package.json
+++ b/packages/astro-htmlnano/package.json
@@ -42,7 +42,7 @@
   },
   "dependencies": {
     "astro-posthtml": "^1.1.4",
-    "cssnano": "^7.1.7",
+    "cssnano": "^8.0.0",
     "htmlnano": "^3.2.1",
     "postcss": "^8.5.10",
     "relateurl": "^0.2.7",
diff --git a/test/astro5/package.json b/test/astro5/package.json
index 4016fa3..8f4398e 100644
--- a/test/astro5/package.json
+++ b/test/astro5/package.json
@@ -18,6 +18,6 @@
     "astro": "^5.18.1",
     "astro-htmlnano": "workspace:*",
     "astro-posthtml": "workspace:*",
-    "htmlnano": "^2.1.5"
+    "htmlnano": "^3.0.0"
   }
 }