diff --git a/package-lock.json b/package-lock.json
index 2106053..aae6377 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -6015,33 +6015,12 @@
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     },
     "clean-css": {
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-      "resolved": "https://registry.npmjs.org/clean-css/-/clean-css-3.4.25.tgz",
-      "integrity": "sha1-nppS1cHmvFEj4bJ4P6Zf6ViUbt4=",
+      "version": "4.1.11",
+      "resolved": "https://registry.npmjs.org/clean-css/-/clean-css-4.1.11.tgz",
+      "integrity": "sha1-Ls3xRaujj1R0DybO/Q/z4D4SXWo=",
       "dev": true,
       "requires": {
-        "commander": "2.8.x",
-        "source-map": "0.4.x"
-      },
-      "dependencies": {
-        "commander": {
-          "version": "2.8.1",
-          "resolved": "https://registry.npmjs.org/commander/-/commander-2.8.1.tgz",
-          "integrity": "sha1-Br42f+v9oMMwqh4qBy09yXYkJdQ=",
-          "dev": true,
-          "requires": {
-            "graceful-readlink": ">= 1.0.0"
-          }
-        },
-        "source-map": {
-          "version": "0.4.4",
-          "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.4.4.tgz",
-          "integrity": "sha1-66T12pwNyZneaAMti092FzZSA2s=",
-          "dev": true,
-          "requires": {
-            "amdefine": ">=0.0.4"
-          }
-        }
+        "source-map": "0.5.x"
       }
     },
     "cli": {
@@ -9304,12 +9283,6 @@
       "resolved": "https://registry.npmjs.org/graceful-fs/-/graceful-fs-4.1.11.tgz",
       "integrity": "sha1-Dovf5NHduIVNZOBOp8AOKgJuVlg="
     },
-    "graceful-readlink": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/graceful-readlink/-/graceful-readlink-1.0.1.tgz",
-      "integrity": "sha1-TK+tdrxi8C+gObL5Tpo906ORpyU=",
-      "dev": true
-    },
     "growly": {
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       "resolved": "https://registry.npmjs.org/growly/-/growly-1.3.0.tgz",
diff --git a/package.json b/package.json
index aa577a4..ef683b2 100644
--- a/package.json
+++ b/package.json
@@ -108,7 +108,7 @@
     "@babel/runtime": "7.5.5",
     "babel-eslint": "10.0.1",
     "babel-loader": "8.0.4",
-    "clean-css": "3.4.25",
+    "clean-css": "4.1.11",
     "css-loader": "0.28.7",
     "eslint": "5.6.1",
     "eslint-config-jitsi": "github:jitsi/eslint-config-jitsi#1.0.1",