diff --git a/package-lock.json b/package-lock.json
index e500be370..b39970f84 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -22,7 +22,7 @@
         "@lezer/highlight": "^1.1.1",
         "@lezer/html": "^1.0.1",
         "@lezer/javascript": "^1.0.2",
-        "clean-css": "5.3.2",
+        "clean-css": "5.3.3",
         "codemirror": "^6.0.1",
         "cosmiconfig": "8.3.6",
         "css-loader": "^6.7.1",
@@ -3874,9 +3874,9 @@
       "dev": true
     },
     "node_modules/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==",
       "dependencies": {
         "source-map": "~0.6.0"
       },
@@ -15416,9 +15416,9 @@
       "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==",
       "requires": {
         "source-map": "~0.6.0"
       }
diff --git a/package.json b/package.json
index 9a4b21802..42010661c 100644
--- a/package.json
+++ b/package.json
@@ -128,7 +128,7 @@
     "@lezer/highlight": "^1.1.1",
     "@lezer/html": "^1.0.1",
     "@lezer/javascript": "^1.0.2",
-    "clean-css": "5.3.2",
+    "clean-css": "5.3.3",
     "codemirror": "^6.0.1",
     "cosmiconfig": "8.3.6",
     "css-loader": "^6.7.1",