diff --git a/package.json b/package.json
index 69e2b07..353db87 100644
--- a/package.json
+++ b/package.json
@@ -20,7 +20,7 @@
     "find-cache-dir": "^3.3.1",
     "meow": "^8.0.0",
     "node-fetch": "^2.6.0",
-    "purgecss": "^3.0.0",
+    "purgecss": "^4.0.0",
     "tiny-glob": "^0.2.6"
   },
   "devDependencies": {
diff --git a/yarn.lock b/yarn.lock
index d381f9f..c2c7bde 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -4227,10 +4227,10 @@ pupa@^2.1.1:
   dependencies:
     escape-goat "^2.0.0"
 
-purgecss@^3.0.0:
-  version "3.1.3"
-  resolved "https://registry.yarnpkg.com/purgecss/-/purgecss-3.1.3.tgz#26987ec09d12eeadc318e22f6e5a9eb0be094f41"
-  integrity sha512-hRSLN9mguJ2lzlIQtW4qmPS2kh6oMnA9RxdIYK8sz18QYqd6ePp4GNDl18oWHA1f2v2NEQIh51CO8s/E3YGckQ==
+purgecss@^4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/purgecss/-/purgecss-4.0.0.tgz#25446199df2ec40d418caf4b95c7548a011be3f1"
+  integrity sha512-j/y6OtNpEiggw/ipCJUOMNLgLpeAv9L8q+SqzEdDzyVEZOfdWjg8yvgOxhBflNyYgJ8SZ+tTwPxrHT9vQUpEPw==
   dependencies:
     commander "^6.0.0"
     glob "^7.0.0"