diff --git a/package-lock.json b/package-lock.json
index e5d9db3..9821e04 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -600,9 +600,9 @@
       }
     },
     "clean-css": {
-      "version": "5.1.2",
-      "resolved": "https://registry.npmjs.org/clean-css/-/clean-css-5.1.2.tgz",
-      "integrity": "sha512-QcaGg9OuMo+0Ds933yLOY+gHPWbxhxqF0HDexmToPf8pczvmvZGYzd+QqWp9/mkucAOKViI+dSFOqoZIvXbeBw==",
+      "version": "5.1.3",
+      "resolved": "https://registry.npmjs.org/clean-css/-/clean-css-5.1.3.tgz",
+      "integrity": "sha512-qGXzUCDpLwAlPx0kYeU4QXjzQIcIYZbJjD4FNm7NnSjoP0hYMVZhHOpUYJ6AwfkMX2cceLRq54MeCgHy/va1cA==",
       "dev": true,
       "requires": {
         "source-map": "~0.6.0"
diff --git a/package.json b/package.json
index 9bc3bc0..8d29b16 100644
--- a/package.json
+++ b/package.json
@@ -41,7 +41,7 @@
     "@11ty/eleventy": "^0.12.1",
     "@11ty/eleventy-plugin-syntaxhighlight": "^3.1.1",
     "all-contributors-cli": "^6.20.0",
-    "clean-css": "^5.1.2",
+    "clean-css": "^5.1.3",
     "html-minifier": "^4.0.0",
     "luxon": "^1.27.0",
     "markdown-it": "^12.0.6",