diff --git a/package-lock.json b/package-lock.json
index f0607a8cd..4a87bb7ec 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -818,12 +818,6 @@
         "repeat-string": "^1.5.2"
       }
     },
-    "amdefine": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/amdefine/-/amdefine-1.0.1.tgz",
-      "integrity": "sha1-SlKCrBZHKek2Gbz9OtFR+BfOkfU=",
-      "dev": true
-    },
     "ansi-regex": {
       "version": "2.1.1",
       "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-2.1.1.tgz",
@@ -2347,42 +2341,21 @@
       }
     },
     "clean-css": {
-      "version": "3.4.28",
-      "resolved": "https://registry.npmjs.org/clean-css/-/clean-css-3.4.28.tgz",
-      "integrity": "sha1-vxlF6C/ICPVWlebd6uwBQA79A/8=",
+      "version": "4.0.13",
+      "resolved": "https://registry.npmjs.org/clean-css/-/clean-css-4.0.13.tgz",
+      "integrity": "sha1-/rKhdgYtcqbD5iTZITysagxIXoA=",
       "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"
       }
     },
     "clean-css-brunch": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/clean-css-brunch/-/clean-css-brunch-2.0.0.tgz",
-      "integrity": "sha1-N8J0dsRwigCUzWRsnEZKwZcMSxc=",
+      "version": "2.10.0",
+      "resolved": "https://registry.npmjs.org/clean-css-brunch/-/clean-css-brunch-2.10.0.tgz",
+      "integrity": "sha1-ahUeZQlYnNNB3OBJgaHHUGKiLRg=",
       "dev": true,
       "requires": {
-        "clean-css": "^3.4.8"
+        "clean-css": "~4.0"
       }
     },
     "cliui": {
diff --git a/package.json b/package.json
index 7324010f2..334fe8a17 100644
--- a/package.json
+++ b/package.json
@@ -12,7 +12,7 @@
   "devDependencies": {
     "babel-brunch": "~7.0.0",
     "brunch": "^2.10.17",
-    "clean-css-brunch": "~2.0.0",
+    "clean-css-brunch": "~2.10.0",
     "css-brunch": "~2.10.0",
     "javascript-brunch": "~2.10.0",
     "uglify-js-brunch": "~2.10.0"