diff --git a/notification-portlet-webapp/package-lock.json b/notification-portlet-webapp/package-lock.json
index 6e14c387..3f550a05 100644
--- a/notification-portlet-webapp/package-lock.json
+++ b/notification-portlet-webapp/package-lock.json
@@ -6,7 +6,7 @@
     "": {
       "name": "notification-portlet-webapp",
       "devDependencies": {
-        "clean-css-cli": "^4.3.0",
+        "clean-css-cli": "^5.0.0",
         "less": "^3.11.3",
         "uglifyjs-folder": "^3.0.0"
       }
@@ -183,6 +183,19 @@
         "node": ">=4"
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+    "node_modules/anymatch": {
+      "version": "3.1.3",
+      "resolved": "https://registry.npmjs.org/anymatch/-/anymatch-3.1.3.tgz",
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+      "dev": true,
+      "dependencies": {
+        "normalize-path": "^3.0.0",
+        "picomatch": "^2.0.4"
+      },
+      "engines": {
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       "resolved": "https://registry.npmjs.org/array-union/-/array-union-2.1.0.tgz",
@@ -259,6 +272,15 @@
         "tweetnacl": "^0.14.3"
       }
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+    "node_modules/binary-extensions": {
+      "version": "2.2.0",
+      "resolved": "https://registry.npmjs.org/binary-extensions/-/binary-extensions-2.2.0.tgz",
+      "integrity": "sha512-jDctJ/IVQbZoJykoeHbhXpOlNBqGNcwXJKJog42E5HDPUwQTSdjCHdihjj0DlnheQ7blbT6dHOafNAiS8ooQKA==",
+      "dev": true,
+      "engines": {
+        "node": ">=8"
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       "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.11.tgz",
@@ -334,33 +356,70 @@
         "node": ">=4"
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+    "node_modules/chokidar": {
+      "version": "3.5.3",
+      "resolved": "https://registry.npmjs.org/chokidar/-/chokidar-3.5.3.tgz",
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+      "dev": true,
+      "funding": [
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+          "url": "https://paulmillr.com/funding/"
+        }
+      ],
+      "dependencies": {
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+        "braces": "~3.0.2",
+        "glob-parent": "~5.1.2",
+        "is-binary-path": "~2.1.0",
+        "is-glob": "~4.0.1",
+        "normalize-path": "~3.0.0",
+        "readdirp": "~3.6.0"
+      },
+      "engines": {
+        "node": ">= 8.10.0"
+      },
+      "optionalDependencies": {
+        "fsevents": "~2.3.2"
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-      "resolved": "https://registry.npmjs.org/clean-css/-/clean-css-4.2.3.tgz",
-      "integrity": "sha512-VcMWDN54ZN/DS+g58HYL5/n4Zrqe8vHJpGA8KdgUXFU4fuP/aHNw8eld9SyEIyabIMJX/0RaY/fplOo5hYLSFA==",
+      "version": "5.3.2",
+      "resolved": "https://registry.npmjs.org/clean-css/-/clean-css-5.3.2.tgz",
+      "integrity": "sha512-JVJbM+f3d3Q704rF4bqQ5UUyTtuJ0JRKNbTKVEeujCCBoMdkEi+V+e8oktO9qGQNSvHrFTM6JZRXrUvGR1czww==",
       "dev": true,
       "dependencies": {
         "source-map": "~0.6.0"
       },
       "engines": {
-        "node": ">= 4.0"
+        "node": ">= 10.0"
       }
     },
     "node_modules/clean-css-cli": {
-      "version": "4.3.0",
-      "resolved": "https://registry.npmjs.org/clean-css-cli/-/clean-css-cli-4.3.0.tgz",
-      "integrity": "sha512-8GHZfr+mG3zB/Lgqrr27qHBFsPSn0fyEI3f2rIZpxPxUbn2J6A8xyyeBRVTW8duDuXigN0s80vsXiXJOEFIO5Q==",
+      "version": "5.6.2",
+      "resolved": "https://registry.npmjs.org/clean-css-cli/-/clean-css-cli-5.6.2.tgz",
+      "integrity": "sha512-GDQkr6zVqHJhO3yWTy3sA22sMCT6iUqaJuBdqZMW6oI25MtiJ2iZXDmWzErpjoRotsB+TYPTpuZSNSgaC1n4lA==",
       "dev": true,
       "dependencies": {
-        "clean-css": "^4.2.1",
-        "commander": "2.x",
-        "glob": "7.x"
+        "chokidar": "^3.5.2",
+        "clean-css": "^5.3.2",
+        "commander": "7.x",
+        "glob": "^7.1.6"
       },
       "bin": {
         "cleancss": "bin/cleancss"
       },
       "engines": {
-        "node": ">= 4.0"
+        "node": ">= 10.12.0"
+      }
+    },
+    "node_modules/clean-css-cli/node_modules/commander": {
+      "version": "7.2.0",
+      "resolved": "https://registry.npmjs.org/commander/-/commander-7.2.0.tgz",
+      "integrity": "sha512-QrWXB+ZQSVPmIWIhtEO9H+gwHaMGYiF5ChvoJ+K9ZGHG/sVsa6yiesAD1GC/x46sET00Xlwo1u49RVVVzvcSkw==",
+      "dev": true,
+      "engines": {
+        "node": ">= 10"
       }
     },
     "node_modules/clone": {
@@ -622,6 +681,20 @@
       "integrity": "sha1-FQStJSMVjKpA20onh8sBQRmU6k8=",
       "dev": true
     },
+    "node_modules/fsevents": {
+      "version": "2.3.2",
+      "resolved": "https://registry.npmjs.org/fsevents/-/fsevents-2.3.2.tgz",
+      "integrity": "sha512-xiqMQR4xAeHTuB9uWm+fFRcIOgKBMiOBP+eXiyT7jsgVCq1bkVygt00oASowB7EdtpOHaaPgKt812P9ab+DDKA==",
+      "dev": true,
+      "hasInstallScript": true,
+      "optional": true,
+      "os": [
+        "darwin"
+      ],
+      "engines": {
+        "node": "^8.16.0 || ^10.6.0 || >=11.0.0"
+      }
+    },
     "node_modules/function-bind": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/function-bind/-/function-bind-1.1.1.tgz",
@@ -798,6 +871,18 @@
       "integrity": "sha1-d8mYQFJ6qOyxqLppe4BkWnqSap0=",
       "dev": true
     },
+    "node_modules/is-binary-path": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/is-binary-path/-/is-binary-path-2.1.0.tgz",
+      "integrity": "sha512-ZMERYes6pDydyuGidse7OsHxtbI7WVeUEozgR/g7rd0xUimYNlvZRE/K2MgZTjWy725IfelLeVcEM97mmtRGXw==",
+      "dev": true,
+      "dependencies": {
+        "binary-extensions": "^2.0.0"
+      },
+      "engines": {
+        "node": ">=8"
+      }
+    },
     "node_modules/is-core-module": {
       "version": "2.10.0",
       "resolved": "https://registry.npmjs.org/is-core-module/-/is-core-module-2.10.0.tgz",
@@ -1120,6 +1205,15 @@
         "validate-npm-package-license": "^3.0.1"
       }
     },
+    "node_modules/normalize-path": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/normalize-path/-/normalize-path-3.0.0.tgz",
+      "integrity": "sha512-6eZs5Ls3WtCisHWp9S2GUy8dqkpGi4BVSz3GaqiE6ezub0512ESztXUwUB6C6IKbQkY2Pnb/mD4WYojCRwcwLA==",
+      "dev": true,
+      "engines": {
+        "node": ">=0.10.0"
+      }
+    },
     "node_modules/oauth-sign": {
       "version": "0.9.0",
       "resolved": "https://registry.npmjs.org/oauth-sign/-/oauth-sign-0.9.0.tgz",
@@ -1230,6 +1324,18 @@
       "dev": true,
       "optional": true
     },
+    "node_modules/picomatch": {
+      "version": "2.3.1",
+      "resolved": "https://registry.npmjs.org/picomatch/-/picomatch-2.3.1.tgz",
+      "integrity": "sha512-JU3teHTNjmE2VCGFzuY8EXzCDVwEqB2a8fsIvwaStHhAWJEeVd1o1QD80CU6+ZdEXXSLbSsuLwJjkCBWqRQUVA==",
+      "dev": true,
+      "engines": {
+        "node": ">=8.6"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/jonschlinkert"
+      }
+    },
     "node_modules/pify": {
       "version": "4.0.1",
       "resolved": "https://registry.npmjs.org/pify/-/pify-4.0.1.tgz",
@@ -1343,6 +1449,18 @@
         "node": ">=8"
       }
     },
+    "node_modules/readdirp": {
+      "version": "3.6.0",
+      "resolved": "https://registry.npmjs.org/readdirp/-/readdirp-3.6.0.tgz",
+      "integrity": "sha512-hOS089on8RduqdbhvQ5Z37A0ESjsqz6qnRcffsMU3495FuTdqSm+7bhJ29JvIOsBDEEnan5DPu9t3To9VRlMzA==",
+      "dev": true,
+      "dependencies": {
+        "picomatch": "^2.2.1"
+      },
+      "engines": {
+        "node": ">=8.10.0"
+      }
+    },
     "node_modules/redent": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/redent/-/redent-3.0.0.tgz",
@@ -1752,18 +1870,6 @@
         "node": ">=10"
       }
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-    "node_modules/uglifyjs-folder/node_modules/picomatch": {
-      "version": "2.3.1",
-      "resolved": "https://registry.npmjs.org/picomatch/-/picomatch-2.3.1.tgz",
-      "integrity": "sha512-JU3teHTNjmE2VCGFzuY8EXzCDVwEqB2a8fsIvwaStHhAWJEeVd1o1QD80CU6+ZdEXXSLbSsuLwJjkCBWqRQUVA==",
-      "dev": true,
-      "engines": {
-        "node": ">=8.6"
-      },
-      "funding": {
-        "url": "https://github.com/sponsors/jonschlinkert"
-      }
-    },
     "node_modules/uglifyjs-folder/node_modules/semver": {
       "version": "7.3.7",
       "resolved": "https://registry.npmjs.org/semver/-/semver-7.3.7.tgz",
diff --git a/notification-portlet-webapp/package.json b/notification-portlet-webapp/package.json
index c08e3da9..9ef1477e 100644
--- a/notification-portlet-webapp/package.json
+++ b/notification-portlet-webapp/package.json
@@ -7,7 +7,7 @@
     "minify-js": "uglifyjs-folder src/main/webapp/scripts --output build/scripts --each"
   },
   "devDependencies": {
-    "clean-css-cli": "^4.3.0",
+    "clean-css-cli": "^5.0.0",
     "less": "^3.11.3",
     "uglifyjs-folder": "^3.0.0"
   }