diff --git a/History.md b/History.md
index 41f7f73..7f4be13 100644
--- a/History.md
+++ b/History.md
@@ -1,3 +1,18 @@
+[5.4.2 / 2021-10-21](https://github.com/clean-css/clean-css-cli/compare/v5.4.1...v5.4.2)
+==================
+
+* Bumps clean-css dependency to 5.2.2.
+
+[5.4.1 / 2021-09-30](https://github.com/clean-css/clean-css-cli/compare/v5.4.0...v5.4.1)
+==================
+
+* Bumps clean-css dependency to 5.2.1.
+
+[5.4.0 / 2021-09-30](https://github.com/clean-css/clean-css-cli/compare/5.3...v5.4.0)
+==================
+
+* Bumps clean-css dependency to 5.2.0.
+
 [5.3.3 / 2021-08-05](https://github.com/clean-css/clean-css-cli/compare/v5.3.2...v5.3.3)
 ==================
 
diff --git a/package-lock.json b/package-lock.json
index 86af45e..5e3808f 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "clean-css-cli",
-  "version": "5.3.3",
+  "version": "5.4.2",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
@@ -19,9 +19,9 @@
       }
     },
     "clean-css": {
-      "version": "5.1.5",
-      "resolved": "https://registry.npmjs.org/clean-css/-/clean-css-5.1.5.tgz",
-      "integrity": "sha512-9dr/cU/LjMpU57PXlSvDkVRh0rPxJBXiBtD0+SgYt8ahTCsXtfKjCkNYgIoTC6mBg8CFr5EKhW3DKCaGMUbUfQ==",
+      "version": "5.2.2",
+      "resolved": "https://registry.npmjs.org/clean-css/-/clean-css-5.2.2.tgz",
+      "integrity": "sha512-/eR8ru5zyxKzpBLv9YZvMXgTSSQn7AdkMItMYynsFgGwTveCRVam9IUPFloE85B4vAIj05IuKmmEoV7/AQjT0w==",
       "requires": {
         "source-map": "~0.6.0"
       },
diff --git a/package.json b/package.json
index 238b15b..70c88f3 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "clean-css-cli",
-  "version": "5.3.3",
+  "version": "5.4.2",
   "description": "A command-line interface to clean-css CSS optimization library",
   "scripts": {
     "check": "jshint ./bin/cleancss .",
@@ -34,7 +34,7 @@
   ],
   "homepage": "https://github.com/clean-css/clean-css-cli#readme",
   "dependencies": {
-    "clean-css": "^5.1.5",
+    "clean-css": "^5.2.2",
     "commander": "7.x",
     "glob": "^7.1.6"
   },