diff --git a/package-lock.json b/package-lock.json
index 8bc4ee5..8321600 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -624,9 +624,9 @@
       "dev": true
     },
     "clean-css": {
-      "version": "5.3.2",
-      "resolved": "https://registry.npmjs.org/clean-css/-/clean-css-5.3.2.tgz",
-      "integrity": "sha512-JVJbM+f3d3Q704rF4bqQ5UUyTtuJ0JRKNbTKVEeujCCBoMdkEi+V+e8oktO9qGQNSvHrFTM6JZRXrUvGR1czww==",
+      "version": "5.3.3",
+      "resolved": "https://registry.npmjs.org/clean-css/-/clean-css-5.3.3.tgz",
+      "integrity": "sha512-D5J+kHaVb/wKSFcyyV75uCn8fiY4sV38XJoe4CUyGQ+mOU/fMVYUdH1hJC+CJQ5uY3EnW27SbJYS4X8BiLrAFg==",
       "dev": true,
       "requires": {
         "source-map": "~0.6.0"
diff --git a/package.json b/package.json
index e6419b5..d071273 100644
--- a/package.json
+++ b/package.json
@@ -7,7 +7,7 @@
   "devDependencies": {
     "@11ty/eleventy": "^1.0.2",
     "@11ty/eleventy-plugin-syntaxhighlight": "^4.2.0",
-    "clean-css": "^5.3.2",
+    "clean-css": "^5.3.3",
     "@11ty/eleventy-img": "^2.0.1"
   }
 }