diff --git a/package-lock.json b/package-lock.json
index 28e41b2..cbd2289 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -12,7 +12,7 @@
         "@11ty/eleventy": "^1.0.1",
         "@11ty/eleventy-plugin-syntaxhighlight": "^4.1.0",
         "all-contributors-cli": "^6.20.0",
-        "clean-css": "^5.3.0",
+        "clean-css": "^5.3.1",
         "html-minifier": "^4.0.0",
         "luxon": "^2.4.0",
         "markdown-it": "^13.0.1",
@@ -880,9 +880,9 @@
       }
     },
     "node_modules/clean-css": {
-      "version": "5.3.0",
-      "resolved": "https://registry.npmjs.org/clean-css/-/clean-css-5.3.0.tgz",
-      "integrity": "sha512-YYuuxv4H/iNb1Z/5IbMRoxgrzjWGhOEFfd+groZ5dMCVkpENiMZmwspdrzBo9286JjM1gZJPAyL7ZIdzuvu2AQ==",
+      "version": "5.3.1",
+      "resolved": "https://registry.npmjs.org/clean-css/-/clean-css-5.3.1.tgz",
+      "integrity": "sha512-lCr8OHhiWCTw4v8POJovCoh4T7I9U11yVsPjMWWnnMmp9ZowCxyad1Pathle/9HjaDp+fdQKjO9fQydE6RHTZg==",
       "dev": true,
       "dependencies": {
         "source-map": "~0.6.0"
@@ -5146,9 +5146,9 @@
       }
     },
     "clean-css": {
-      "version": "5.3.0",
-      "resolved": "https://registry.npmjs.org/clean-css/-/clean-css-5.3.0.tgz",
-      "integrity": "sha512-YYuuxv4H/iNb1Z/5IbMRoxgrzjWGhOEFfd+groZ5dMCVkpENiMZmwspdrzBo9286JjM1gZJPAyL7ZIdzuvu2AQ==",
+      "version": "5.3.1",
+      "resolved": "https://registry.npmjs.org/clean-css/-/clean-css-5.3.1.tgz",
+      "integrity": "sha512-lCr8OHhiWCTw4v8POJovCoh4T7I9U11yVsPjMWWnnMmp9ZowCxyad1Pathle/9HjaDp+fdQKjO9fQydE6RHTZg==",
       "dev": true,
       "requires": {
         "source-map": "~0.6.0"
diff --git a/package.json b/package.json
index 18ceaac..9ec3cf1 100644
--- a/package.json
+++ b/package.json
@@ -40,7 +40,7 @@
     "@11ty/eleventy": "^1.0.1",
     "@11ty/eleventy-plugin-syntaxhighlight": "^4.1.0",
     "all-contributors-cli": "^6.20.0",
-    "clean-css": "^5.3.0",
+    "clean-css": "^5.3.1",
     "html-minifier": "^4.0.0",
     "luxon": "^2.4.0",
     "markdown-it": "^13.0.1",