diff --git a/package-lock.json b/package-lock.json
index 89f12491a4..8064ad8c27 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -723,9 +723,9 @@
       "integrity": "sha512-jJ0bqzaylmJtVnNgzTeSOs8DPavpbYgEr/b0YL8/2GO3xJEhInFmhKMUnEJQjZumK7KXGFhUy89PrsJWlakBVg=="
     },
     "clean-css": {
-      "version": "5.2.4",
-      "resolved": "https://registry.npmjs.org/clean-css/-/clean-css-5.2.4.tgz",
-      "integrity": "sha512-nKseG8wCzEuji/4yrgM/5cthL9oTDc5UOQyFMvW/Q53oP6gLH690o1NbuTh6Y18nujr7BxlsFuS7gXLnLzKJGg==",
+      "version": "5.3.1",
+      "resolved": "https://registry.npmjs.org/clean-css/-/clean-css-5.3.1.tgz",
+      "integrity": "sha512-lCr8OHhiWCTw4v8POJovCoh4T7I9U11yVsPjMWWnnMmp9ZowCxyad1Pathle/9HjaDp+fdQKjO9fQydE6RHTZg==",
       "requires": {
         "source-map": "~0.6.0"
       }
diff --git a/package.json b/package.json
index 7a1b270835..e04e383611 100644
--- a/package.json
+++ b/package.json
@@ -86,7 +86,7 @@
     "test:integration": "karma start ./tests/spec/karma.conf.js --single-run"
   },
   "dependencies": {
-    "clean-css": "^5.2.4",
+    "clean-css": "^5.3.1",
     "colors": "^1.4.0",
     "finalhandler": "^1.1.2",
     "marked": "^3.0.8",