diff --git a/notification-portlet-webapp/package-lock.json b/notification-portlet-webapp/package-lock.json
index 6729ad73f..b463fb1b0 100644
--- a/notification-portlet-webapp/package-lock.json
+++ b/notification-portlet-webapp/package-lock.json
@@ -89,6 +89,16 @@
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-      "integrity": "sha1-ibTRmasr7kneFk6gK4nORi1xt2c=",
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@@ -162,6 +172,12 @@
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+        "normalize-path": "~3.0.0",
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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==",
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+      "resolved": "https://registry.npmjs.org/clean-css/-/clean-css-5.2.4.tgz",
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+      "resolved": "https://registry.npmjs.org/clean-css-cli/-/clean-css-cli-5.5.2.tgz",
+      "integrity": "sha512-4y5FD+ayRz7IWqZRCCMvFxNUhluc1Yv8mNPmrHbrm2NjKsv9uaQZedZKN4L+QMkTqANL1RfOwhpe22neDEgEMA==",
       "dev": true,
       "requires": {
-        "clean-css": "^4.2.1",
-        "commander": "2.x",
-        "glob": "7.x"
+        "chokidar": "^3.5.2",
+        "clean-css": "^5.2.4",
+        "commander": "7.x",
+        "glob": "^7.1.6"
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+          "resolved": "https://registry.npmjs.org/commander/-/commander-7.2.0.tgz",
+          "integrity": "sha512-QrWXB+ZQSVPmIWIhtEO9H+gwHaMGYiF5ChvoJ+K9ZGHG/sVsa6yiesAD1GC/x46sET00Xlwo1u49RVVVzvcSkw==",
+          "dev": true
+        }
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@@ -480,6 +521,13 @@
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+      "resolved": "https://registry.npmjs.org/fsevents/-/fsevents-2.3.2.tgz",
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@@ -491,9 +539,9 @@
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+      "version": "7.2.0",
+      "resolved": "https://registry.npmjs.org/glob/-/glob-7.2.0.tgz",
+      "integrity": "sha512-lmLf6gtyrPq8tTjSmrO94wBeQbFR3HbLHbuyD69wuyQkImp2hWqMGB47OX65FBkPffO641IP9jWa1z4ivqG26Q==",
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@@ -622,6 +670,15 @@
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+      "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,
+      "requires": {
+        "binary-extensions": "^2.0.0"
+      }
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@@ -840,9 +897,9 @@
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-      "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-3.0.4.tgz",
-      "integrity": "sha512-yJHVQEhyqPLUTgt9B83PXu6W3rx4MvvHvSUvToogpwoGDOUQ+yDrR0HRot+yOCdCO7u4hX3pWft6kWBBcqh0UA==",
+      "version": "3.1.2",
+      "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-3.1.2.tgz",
+      "integrity": "sha512-J7p63hRiAjw1NDEww1W7i37+ByIrOWO5XQQAzZ3VOcL0PNybwpfmV/N05zFAzwQ9USyEcX6t3UO+K5aqBQOIHw==",
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@@ -885,6 +942,12 @@
         "validate-npm-package-license": "^3.0.1"
       }
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+    "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
+    },
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       "resolved": "https://registry.npmjs.org/oauth-sign/-/oauth-sign-0.9.0.tgz",
@@ -1064,6 +1127,15 @@
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+    "readdirp": {
+      "version": "3.6.0",
+      "resolved": "https://registry.npmjs.org/readdirp/-/readdirp-3.6.0.tgz",
+      "integrity": "sha512-hOS089on8RduqdbhvQ5Z37A0ESjsqz6qnRcffsMU3495FuTdqSm+7bhJ29JvIOsBDEEnan5DPu9t3To9VRlMzA==",
+      "dev": true,
+      "requires": {
+        "picomatch": "^2.2.1"
+      }
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     "redent": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/redent/-/redent-3.0.0.tgz",
diff --git a/notification-portlet-webapp/package.json b/notification-portlet-webapp/package.json
index 080e3daa1..7e7941349 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": "^2.0.0"
   }