diff --git a/package-lock.json b/package-lock.json
index 6669a87..35b0705 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -443,19 +443,18 @@
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-      "integrity": "sha1-z9AeD7uj1srtBJ+9dY1A9lGW9Xw=",
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-        "underscore.string": "~2.4.0"
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-          "integrity": "sha1-jN2PusTi0uoefi6Al8QvRCKA+Fs=",
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@@ -475,6 +474,12 @@
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+      "resolved": "https://registry.npmjs.org/array-each/-/array-each-1.0.1.tgz",
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@@ -485,6 +490,12 @@
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@@ -1597,9 +1602,9 @@
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-      "integrity": "sha1-sCIMAt6YYXQztyhRz0fePfLNvuk=",
+      "version": "3.0.3",
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@@ -1696,6 +1701,12 @@
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+      "resolved": "https://registry.npmjs.org/detect-file/-/detect-file-1.0.0.tgz",
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@@ -1992,9 +2003,9 @@
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-      "integrity": "sha1-n1V+CPw7TSbs6d00+Pv0drYlha0=",
+      "version": "4.0.1",
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@@ -2040,7 +2051,7 @@
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-      "integrity": "sha1-BjJjj42HfMghB9MKD/8aF8uhzQw=",
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@@ -2075,6 +2086,15 @@
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+      "dev": true,
+      "requires": {
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@@ -2309,43 +2329,42 @@
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-      "integrity": "sha1-fz56l7gjksZTvwZYm9hRkOk8NoM=",
+      "version": "0.3.0",
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-        "lodash": "~2.4.1"
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-          "resolved": "https://registry.npmjs.org/glob/-/glob-3.2.11.tgz",
-          "integrity": "sha1-Spc/Y1uRkPcV0QmH1cAP0oFevj0=",
+          "version": "5.0.15",
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           "dev": true,
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-          "integrity": "sha1-J12O2qxPG7MyZHIInnlJyDlGmd0=",
-          "dev": true,
-          "requires": {
-            "lru-cache": "2",
-            "sigmund": "~1.0.0"
+            "minimatch": "2 || 3",
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+      "resolved": "https://registry.npmjs.org/fined/-/fined-1.2.0.tgz",
+      "integrity": "sha512-ZYDqPLGxDkDhDZBjZBb+oD1+j0rA4E0pXY50eplAAOPg2N/gUBSSk5IM1/QhPfyVo19lJ+CvXpqfvk+b2p/8Ng==",
+      "dev": true,
+      "requires": {
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+        "is-plain-object": "^2.0.3",
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@@ -2361,6 +2380,12 @@
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+      "resolved": "https://registry.npmjs.org/flagged-respawn/-/flagged-respawn-1.0.1.tgz",
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       "integrity": "sha1-gQaNKVqBQuwKxybG4iAMMPttXoA="
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+    "for-own": {
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+      "resolved": "https://registry.npmjs.org/for-own/-/for-own-1.0.0.tgz",
+      "integrity": "sha512-0OABksIGrxKK8K4kynWkQ7y1zounQxP+CWnyclVwj81KW3vlLlGUx57DKGcP/LH216GzqnstnPocF16Nxs0Ycg==",
+      "dev": true,
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@@ -2487,7 +2521,8 @@
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+          "dev": true,
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@@ -2508,12 +2543,14 @@
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-          "dev": true
+          "dev": true,
+          "optional": true
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           "version": "1.1.11",
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@@ -2528,17 +2565,20 @@
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+          "dev": true,
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           "version": "0.0.1",
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+          "dev": true,
+          "optional": true
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+          "dev": true,
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@@ -2655,7 +2695,8 @@
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+          "dev": true,
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@@ -2667,6 +2708,7 @@
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@@ -2681,6 +2723,7 @@
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@@ -2688,12 +2731,14 @@
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           "version": "0.0.8",
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-          "dev": true
+          "dev": true,
+          "optional": true
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           "version": "2.3.5",
           "bundled": true,
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@@ -2712,6 +2757,7 @@
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@@ -2799,7 +2845,8 @@
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@@ -2811,6 +2858,7 @@
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@@ -2896,7 +2944,8 @@
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@@ -2932,6 +2981,7 @@
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@@ -2951,6 +3001,7 @@
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           "bundled": true,
           "dev": true,
+          "optional": true,
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@@ -2994,15 +3045,23 @@
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           "version": "1.0.2",
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+          "dev": true,
+          "optional": true
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-          "dev": true
+          "dev": true,
+          "optional": true
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+      "resolved": "https://registry.npmjs.org/function-bind/-/function-bind-1.1.1.tgz",
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+    },
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-      "integrity": "sha1-BHpEl4n6Fg0Bj1SG7ZEyC27HiFw=",
+      "version": "1.0.2",
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@@ -3092,6 +3151,30 @@
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       "integrity": "sha1-jFoUlNIGbFcMw7/kSWF1rMTVAqs="
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+      "resolved": "https://registry.npmjs.org/global-modules/-/global-modules-1.0.0.tgz",
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+      "dev": true,
+      "requires": {
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+        "is-windows": "^1.0.1",
+        "resolve-dir": "^1.0.0"
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+      "resolved": "https://registry.npmjs.org/global-prefix/-/global-prefix-1.0.2.tgz",
+      "integrity": "sha512-5lsx1NUDHtSjfg0eHlmYvZKv8/nVqX4ckFbM+FrGcQ+04KWcWFo9P5MxPZYSzUvyzmdTbI7Eix8Q4IbELDqzKg==",
+      "dev": true,
+      "requires": {
+        "expand-tilde": "^2.0.2",
+        "homedir-polyfill": "^1.0.1",
+        "ini": "^1.3.4",
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@@ -3179,12 +3262,6 @@
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@@ -3613,92 +3690,72 @@
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-      "integrity": "sha1-VpN81RlDJK3/bSB2MYMqnWuk5/A=",
+      "version": "1.5.3",
+      "resolved": "https://registry.npmjs.org/grunt/-/grunt-1.5.3.tgz",
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-        "coffee-script": "~1.3.3",
-        "colors": "~0.6.2",
-        "dateformat": "1.0.2-1.2.3",
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-        "underscore.string": "~2.2.1",
-        "which": "~1.0.5"
+        "exit": "~0.1.2",
+        "findup-sync": "~0.3.0",
+        "glob": "~7.1.6",
+        "grunt-cli": "~1.4.3",
+        "grunt-known-options": "~2.0.0",
+        "grunt-legacy-log": "~3.0.0",
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-      "version": "2.2.1",
-      "resolved": "https://registry.npmjs.org/underscore.string/-/underscore.string-2.2.1.tgz",
-      "integrity": "sha1-18D6KvXVoaZ/QlPa7pgTLnM/Dxk=",
-      "dev": true
+      "version": "3.3.6",
+      "resolved": "https://registry.npmjs.org/underscore.string/-/underscore.string-3.3.6.tgz",
+      "integrity": "sha512-VoC83HWXmCrF6rgkyxS9GHv8W9Q5nhMKho+OadDJGzL2oDYbYEppBaCMH6pFlwLeqj2QS+hhkw2kpXkSdD1JxQ==",
+      "dev": true,
+      "requires": {
+        "sprintf-js": "^1.1.1",
+        "util-deprecate": "^1.0.2"
+      }
     },
     "union-value": {
       "version": "1.0.1",
@@ -6746,6 +7155,15 @@
       "resolved": "https://registry.npmjs.org/uuid/-/uuid-3.3.3.tgz",
       "integrity": "sha512-pW0No1RGHgzlpHJO1nsVrHKpOEIxkGg1xB+v0ZmdNH5OAeAwzAVrCnI2/6Mtx+Uys6iaylxa+D3g4j63IKKjSQ=="
     },
+    "v8flags": {
+      "version": "3.2.0",
+      "resolved": "https://registry.npmjs.org/v8flags/-/v8flags-3.2.0.tgz",
+      "integrity": "sha512-mH8etigqMfiGWdeXpaaqGfs6BndypxusHHcv2qSHyZkGEznCd/qAXCWWRzeowtL54147cktFOC4P5y+kl8d8Jg==",
+      "dev": true,
+      "requires": {
+        "homedir-polyfill": "^1.0.1"
+      }
+    },
     "validate-npm-package-license": {
       "version": "3.0.4",
       "resolved": "https://registry.npmjs.org/validate-npm-package-license/-/validate-npm-package-license-3.0.4.tgz",
@@ -6867,7 +7285,7 @@
         },
         "yargs": {
           "version": "6.6.0",
-          "resolved": "http://registry.npmjs.org/yargs/-/yargs-6.6.0.tgz",
+          "resolved": "https://registry.npmjs.org/yargs/-/yargs-6.6.0.tgz",
           "integrity": "sha1-eC7CHvQDNF+DCoCMo9UTr1YGUgg=",
           "dev": true,
           "requires": {
@@ -6921,10 +7339,13 @@
       "integrity": "sha512-nqHUnMXmBzT0w570r2JpJxfiSD1IzoI+HGVdd3aZ0yNi3ngvQ4jv1dtHt5VGxfI2yj5yqImPhOK4vmIh2xMbGg=="
     },
     "which": {
-      "version": "1.0.9",
-      "resolved": "https://registry.npmjs.org/which/-/which-1.0.9.tgz",
-      "integrity": "sha1-RgwdoPgQED0DIam2M6+eV15kSG8=",
-      "dev": true
+      "version": "1.3.1",
+      "resolved": "https://registry.npmjs.org/which/-/which-1.3.1.tgz",
+      "integrity": "sha512-HxJdYWq1MTIQbJ3nw0cqssHoTNU267KlrDuGZ1WYlxDStUtKUhOaJmh112/TZmHxxUfuJqPXSOm7tDyas0OSIQ==",
+      "dev": true,
+      "requires": {
+        "isexe": "^2.0.0"
+      }
     },
     "which-module": {
       "version": "1.0.0",
diff --git a/package.json b/package.json
index efb905f..7251aba 100644
--- a/package.json
+++ b/package.json
@@ -12,7 +12,7 @@
   },
   "devDependencies": {
     "copy-webpack-plugin": "^4.6.0",
-    "grunt": "~0.4.5",
+    "grunt": "~1.5.3",
     "grunt-contrib-clean": "^1.0.0",
     "grunt-contrib-copy": "^1.0.0",
     "webpack": "^2.6.1"