diff --git a/package-lock.json b/package-lock.json
index f38da6f..4b4ae01 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1087,14 +1087,11 @@
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-      "resolved": "https://registry.npmjs.org/braces/-/braces-1.8.5.tgz",
-      "integrity": "sha1-uneWLhLf+WnWt2cR6RS3N4V79qc=",
-      "dev": true,
+      "version": "3.0.2",
+      "resolved": "https://registry.npmjs.org/braces/-/braces-3.0.2.tgz",
+      "integrity": "sha512-b8um+L1RzM3WDSzvhm6gIz1yfTbBt6YTlcEKAvsmqCZZFw46z626lVj9j1yEPW33H5H+lBQpZMP1k8l+78Ha0A==",
       "requires": {
-        "expand-range": "^1.8.1",
-        "preserve": "^0.2.0",
-        "repeat-element": "^1.1.2"
+        "fill-range": "^7.0.1"
       }
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@@ -1362,6 +1359,15 @@
         "through2": "0.6.x"
       },
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+          "version": "2.2.23",
+          "resolved": "https://registry.npmjs.org/clean-css/-/clean-css-2.2.23.tgz",
+          "integrity": "sha1-BZC1R4tRbEkD7cLYm9P9vdKGMow=",
+          "dev": true,
+          "requires": {
+            "commander": "2.2.x"
+          }
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         "lodash": {
           "version": "3.6.0",
           "resolved": "https://registry.npmjs.org/lodash/-/lodash-3.6.0.tgz",
@@ -2205,12 +2211,18 @@
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-      "version": "2.2.23",
-      "resolved": "https://registry.npmjs.org/clean-css/-/clean-css-2.2.23.tgz",
-      "integrity": "sha1-BZC1R4tRbEkD7cLYm9P9vdKGMow=",
-      "dev": true,
+      "version": "4.2.1",
+      "resolved": "https://registry.npmjs.org/clean-css/-/clean-css-4.2.1.tgz",
+      "integrity": "sha512-4ZxI6dy4lrY6FHzfiy1aEOXgu4LIsW2MhwG0VBKdcoGoH/XLFgaHSdLTGr4O8Be6A8r3MOphEiI8Gc1n0ecf3g==",
       "requires": {
-        "commander": "2.2.x"
+        "source-map": "~0.6.0"
+      },
+      "dependencies": {
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+          "version": "0.6.1",
+          "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.6.1.tgz",
+          "integrity": "sha512-UjgapumWlbMhkBgzT7Ykc5YXUT46F0iKu8SGXq0bcwP5dz/h0Plj6enJqjz1Zbq2l5WaqYnrVbwWOWMyF3F47g=="
+        }
       }
     },
     "cli-cursor": {
@@ -4176,6 +4188,30 @@
       "dev": true,
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+      },
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+        "fill-range": {
+          "version": "2.2.4",
+          "resolved": "https://registry.npmjs.org/fill-range/-/fill-range-2.2.4.tgz",
+          "integrity": "sha512-cnrcCbj01+j2gTG921VZPnHbjmdAf8oQV/iGeV2kZxGSyfYjjTyY79ErsK1WJWMpw6DaApEX72binqJE+/d+5Q==",
+          "dev": true,
+          "requires": {
+            "is-number": "^2.1.0",
+            "isobject": "^2.0.0",
+            "randomatic": "^3.0.0",
+            "repeat-element": "^1.1.2",
+            "repeat-string": "^1.5.2"
+          }
+        },
+        "is-number": {
+          "version": "2.1.0",
+          "resolved": "https://registry.npmjs.org/is-number/-/is-number-2.1.0.tgz",
+          "integrity": "sha1-Afy7s5NGOlSPL0ZszhbezknbkI8=",
+          "dev": true,
+          "requires": {
+            "kind-of": "^3.0.2"
+          }
+        }
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@@ -4285,16 +4321,21 @@
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-      "resolved": "https://registry.npmjs.org/fill-range/-/fill-range-2.2.4.tgz",
-      "integrity": "sha512-cnrcCbj01+j2gTG921VZPnHbjmdAf8oQV/iGeV2kZxGSyfYjjTyY79ErsK1WJWMpw6DaApEX72binqJE+/d+5Q==",
-      "dev": true,
+      "version": "7.0.1",
+      "resolved": "https://registry.npmjs.org/fill-range/-/fill-range-7.0.1.tgz",
+      "integrity": "sha512-qOo9F+dMUmC2Lcb4BbVvnKJxTPjCm+RRpe4gDuGrzkL7mEVl/djYSu2OdQ2Pa302N4oqkSg9ir6jaLWJ2USVpQ==",
       "requires": {
-        "is-number": "^2.1.0",
-        "isobject": "^2.0.0",
-        "randomatic": "^3.0.0",
-        "repeat-element": "^1.1.2",
-        "repeat-string": "^1.5.2"
+        "to-regex-range": "^5.0.1"
+      },
+      "dependencies": {
+        "to-regex-range": {
+          "version": "5.0.1",
+          "resolved": "https://registry.npmjs.org/to-regex-range/-/to-regex-range-5.0.1.tgz",
+          "integrity": "sha512-65P7iz6X5yEr1cwcgvQxbbIw7Uk3gOy5dIdtZ4rDveLqhrdJP+Li/Hx6tyK0NEb+2GCyneCMJiGqrADCSNk8sQ==",
+          "requires": {
+            "is-number": "^7.0.0"
+          }
+        }
       }
     },
     "finalhandler": {
@@ -6139,13 +6180,9 @@
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-      "version": "2.1.0",
-      "resolved": "https://registry.npmjs.org/is-number/-/is-number-2.1.0.tgz",
-      "integrity": "sha1-Afy7s5NGOlSPL0ZszhbezknbkI8=",
-      "dev": true,
-      "requires": {
-        "kind-of": "^3.0.2"
-      }
+      "version": "7.0.0",
+      "resolved": "https://registry.npmjs.org/is-number/-/is-number-7.0.0.tgz",
+      "integrity": "sha512-41Cifkg6e8TylSpdtTpeLVMqvSBEVzTttHvERD741+pnZ8ANv0004MRL43QKPDlK9cGvNp6NZWZUBlbGXYxxng=="
     },
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@@ -7003,9 +7040,9 @@
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-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/math-random/-/math-random-1.0.1.tgz",
-      "integrity": "sha1-izqsWIuKZuSXXjzepn97sylgH6w=",
+      "version": "1.0.4",
+      "resolved": "https://registry.npmjs.org/math-random/-/math-random-1.0.4.tgz",
+      "integrity": "sha512-rUxjysqif/BZQH2yhd5Aaq7vXMSx9NdEsQcyA07uEzIvxgI7zIr33gGsh+RU0/XjmQpCW7RsVof1vlkvQVCK5A==",
       "dev": true
     },
     "md5": {
@@ -7140,6 +7177,19 @@
         "object.omit": "^2.0.0",
         "parse-glob": "^3.0.4",
         "regex-cache": "^0.4.2"
+      },
+      "dependencies": {
+        "braces": {
+          "version": "1.8.5",
+          "resolved": "https://registry.npmjs.org/braces/-/braces-1.8.5.tgz",
+          "integrity": "sha1-uneWLhLf+WnWt2cR6RS3N4V79qc=",
+          "dev": true,
+          "requires": {
+            "expand-range": "^1.8.1",
+            "preserve": "^0.2.0",
+            "repeat-element": "^1.1.2"
+          }
+        }
       }
     },
     "miller-rabin": {
@@ -8845,9 +8895,9 @@
       "dev": true
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     "randomatic": {
-      "version": "3.0.0",
-      "resolved": "https://registry.npmjs.org/randomatic/-/randomatic-3.0.0.tgz",
-      "integrity": "sha512-VdxFOIEY3mNO5PtSRkkle/hPJDHvQhK21oa73K4yAc9qmp6N429gAyF1gZMOTMeS0/AYzaV/2Trcef+NaIonSA==",
+      "version": "3.1.1",
+      "resolved": "https://registry.npmjs.org/randomatic/-/randomatic-3.1.1.tgz",
+      "integrity": "sha512-TuDE5KxZ0J461RVjrJZCJc+J+zCkTb1MbH9AQUq68sMhOMcy9jLcb3BrZKgp9q9Ncltdg4QVqWrH02W2EFFVYw==",
       "dev": true,
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diff --git a/package.json b/package.json
index daa946a..0b7d7a0 100644
--- a/package.json
+++ b/package.json
@@ -79,6 +79,7 @@
     ]
   },
   "dependencies": {
+    "clean-css": "^4.2.1",
     "lodash": "^4.17.11",
     "ws": "^7.0.1"
   }