diff --git a/package-lock.json b/package-lock.json
index 0a220f334e..59def7f292 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -29,7 +29,7 @@
         "buble": "^0.20.0",
         "buble-loader": "^0.5.1",
         "chaikin-smooth": "^1.0.4",
-        "clean-css-cli": "5.3.2",
+        "clean-css-cli": "5.3.3",
         "copy-webpack-plugin": "^9.0.0",
         "coverage-istanbul-loader": "^3.0.5",
         "coveralls": "3.1.1",
@@ -3073,9 +3073,9 @@
       }
     },
     "node_modules/clean-css": {
-      "version": "5.1.4",
-      "resolved": "https://registry.npmjs.org/clean-css/-/clean-css-5.1.4.tgz",
-      "integrity": "sha512-e6JAuR0T2ahg7fOSv98Nxqh7mHWOac5TaCSgrr61h/6mkPLwlxX38hzob4h6IKj/UHlrrLXvAEjWqXlvi8r8lQ==",
+      "version": "5.1.5",
+      "resolved": "https://registry.npmjs.org/clean-css/-/clean-css-5.1.5.tgz",
+      "integrity": "sha512-9dr/cU/LjMpU57PXlSvDkVRh0rPxJBXiBtD0+SgYt8ahTCsXtfKjCkNYgIoTC6mBg8CFr5EKhW3DKCaGMUbUfQ==",
       "dev": true,
       "dependencies": {
         "source-map": "~0.6.0"
@@ -3085,12 +3085,12 @@
       }
     },
     "node_modules/clean-css-cli": {
-      "version": "5.3.2",
-      "resolved": "https://registry.npmjs.org/clean-css-cli/-/clean-css-cli-5.3.2.tgz",
-      "integrity": "sha512-NZY3lWHeeb9idk/0f37yDLeb3Y8UUiuuRCYKVVioqFJU83f3uuJUz7qIIYBgAWARv56D0MLOkwqQcq5fTtK6vQ==",
+      "version": "5.3.3",
+      "resolved": "https://registry.npmjs.org/clean-css-cli/-/clean-css-cli-5.3.3.tgz",
+      "integrity": "sha512-Reo/w25/3J2uRL4EFHvo92Tv97uhefyHranTpxXNqQ7iIRB8oxRNVlXC+Xcq8RWO2LjSyOofrb7AU6I6oXpPpA==",
       "dev": true,
       "dependencies": {
-        "clean-css": "^5.1.4",
+        "clean-css": "^5.1.5",
         "commander": "7.x",
         "glob": "^7.1.6"
       },
@@ -13661,9 +13661,9 @@
       "dev": true
     },
     "clean-css": {
-      "version": "5.1.4",
-      "resolved": "https://registry.npmjs.org/clean-css/-/clean-css-5.1.4.tgz",
-      "integrity": "sha512-e6JAuR0T2ahg7fOSv98Nxqh7mHWOac5TaCSgrr61h/6mkPLwlxX38hzob4h6IKj/UHlrrLXvAEjWqXlvi8r8lQ==",
+      "version": "5.1.5",
+      "resolved": "https://registry.npmjs.org/clean-css/-/clean-css-5.1.5.tgz",
+      "integrity": "sha512-9dr/cU/LjMpU57PXlSvDkVRh0rPxJBXiBtD0+SgYt8ahTCsXtfKjCkNYgIoTC6mBg8CFr5EKhW3DKCaGMUbUfQ==",
       "dev": true,
       "requires": {
         "source-map": "~0.6.0"
@@ -13678,12 +13678,12 @@
       }
     },
     "clean-css-cli": {
-      "version": "5.3.2",
-      "resolved": "https://registry.npmjs.org/clean-css-cli/-/clean-css-cli-5.3.2.tgz",
-      "integrity": "sha512-NZY3lWHeeb9idk/0f37yDLeb3Y8UUiuuRCYKVVioqFJU83f3uuJUz7qIIYBgAWARv56D0MLOkwqQcq5fTtK6vQ==",
+      "version": "5.3.3",
+      "resolved": "https://registry.npmjs.org/clean-css-cli/-/clean-css-cli-5.3.3.tgz",
+      "integrity": "sha512-Reo/w25/3J2uRL4EFHvo92Tv97uhefyHranTpxXNqQ7iIRB8oxRNVlXC+Xcq8RWO2LjSyOofrb7AU6I6oXpPpA==",
       "dev": true,
       "requires": {
-        "clean-css": "^5.1.4",
+        "clean-css": "^5.1.5",
         "commander": "7.x",
         "glob": "^7.1.6"
       }
diff --git a/package.json b/package.json
index 94c4942b54..f75efec8b0 100644
--- a/package.json
+++ b/package.json
@@ -65,7 +65,7 @@
     "buble": "^0.20.0",
     "buble-loader": "^0.5.1",
     "chaikin-smooth": "^1.0.4",
-    "clean-css-cli": "5.3.2",
+    "clean-css-cli": "5.3.3",
     "copy-webpack-plugin": "^9.0.0",
     "coverage-istanbul-loader": "^3.0.5",
     "coveralls": "3.1.1",