diff --git a/package-lock.json b/package-lock.json
index f1df19d..46dee7a 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -16,20 +16,28 @@
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@@ -225,6 +249,27 @@
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@@ -248,12 +293,6 @@
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@@ -264,10 +303,25 @@
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@@ -720,6 +775,12 @@
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@@ -1006,6 +1072,12 @@
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+      "resolved": "https://registry.npmjs.org/has-flag/-/has-flag-4.0.0.tgz",
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+      "dev": true
+    },
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       "resolved": "https://registry.npmjs.org/has-value/-/has-value-1.0.0.tgz",
@@ -1060,10 +1132,23 @@
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-      "resolved": "https://registry.npmjs.org/iconv-lite/-/iconv-lite-0.2.11.tgz",
-      "integrity": "sha1-HOYKOleGSiktEyH/RgnKS7llrcg=",
-      "dev": true
+      "version": "0.4.24",
+      "resolved": "https://registry.npmjs.org/iconv-lite/-/iconv-lite-0.4.24.tgz",
+      "integrity": "sha512-v3MXnZAcvnywkTUEZomIActle7RXXeedOR31wwl7VlyoXO4Qi9arvSenNQWne1TcRwhCL1HwLI21bEqdpj8/rA==",
+      "dev": true,
+      "requires": {
+        "safer-buffer": ">= 2.1.2 < 3"
+      }
+    },
+    "inflight": {
+      "version": "1.0.6",
+      "resolved": "https://registry.npmjs.org/inflight/-/inflight-1.0.6.tgz",
+      "integrity": "sha1-Sb1jMdfQLQwJvJEKEHW6gWW1bfk=",
+      "dev": true,
+      "requires": {
+        "once": "^1.3.0",
+        "wrappy": "1"
+      }
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@@ -1287,13 +1372,13 @@
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-      "resolved": "https://registry.npmjs.org/js-yaml/-/js-yaml-2.0.5.tgz",
-      "integrity": "sha1-olrmUJmZ6X3yeMZxnaEb0Gh3Q6g=",
+      "version": "3.14.1",
+      "resolved": "https://registry.npmjs.org/js-yaml/-/js-yaml-3.14.1.tgz",
+      "integrity": "sha512-okMH7OXXJ7YrN9Ok3/SXrnu4iX9yOk+25nqX4imS2npuvTYDmo/QEZoqwZkYaIDk3jVvBOTOIEgEhaLOynBS9g==",
       "dev": true,
       "requires": {
-        "argparse": "~ 0.1.11",
-        "esprima": "~ 1.0.2"
+        "argparse": "^1.0.7",
+        "esprima": "^4.0.0"
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@@ -1351,9 +1436,9 @@
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-      "resolved": "https://registry.npmjs.org/lodash/-/lodash-0.9.2.tgz",
-      "integrity": "sha1-jzSZxSRdNG1oLlsNO0B2fgnxqSw=",
+      "version": "4.17.21",
+      "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.21.tgz",
+      "integrity": "sha512-v2kDEe57lecTulaDIuNTPy3Ry4gLGJ6Z1O3vE1krgXZNrsQ+LFTGHVxVjcXPs17LhbZVGedAJv8XZ1tvj5FvSg==",
       "dev": true
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@@ -1546,9 +1631,9 @@
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-      "version": "1.0.10",
-      "resolved": "https://registry.npmjs.org/nopt/-/nopt-1.0.10.tgz",
-      "integrity": "sha1-bd0hvSoxQXuScn3Vhfim83YI6+4=",
+      "version": "3.0.6",
+      "resolved": "https://registry.npmjs.org/nopt/-/nopt-3.0.6.tgz",
+      "integrity": "sha1-xkZdvwirzU2zWTF/eaxopkayj/k=",
       "dev": true,
       "requires": {
         "abbrev": "1"
@@ -1651,6 +1736,15 @@
         "isobject": "^3.0.1"
       }
     },
+    "once": {
+      "version": "1.4.0",
+      "resolved": "https://registry.npmjs.org/once/-/once-1.4.0.tgz",
+      "integrity": "sha1-WDsap3WWHUsROsF9nFC6753Xa9E=",
+      "dev": true,
+      "requires": {
+        "wrappy": "1"
+      }
+    },
     "os-homedir": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/os-homedir/-/os-homedir-1.0.2.tgz",
@@ -1696,6 +1790,12 @@
       "integrity": "sha1-s2PlXoAGym/iF4TS2yK9FdeRfxQ=",
       "dev": true
     },
+    "path-is-absolute": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/path-is-absolute/-/path-is-absolute-1.0.1.tgz",
+      "integrity": "sha1-F0uSaHNVNP+8es5r9TpanhtcX18=",
+      "dev": true
+    },
     "path-parse": {
       "version": "1.0.6",
       "resolved": "https://registry.npmjs.org/path-parse/-/path-parse-1.0.6.tgz",
@@ -1812,6 +1912,12 @@
         "ret": "~0.1.10"
       }
     },
+    "safer-buffer": {
+      "version": "2.1.2",
+      "resolved": "https://registry.npmjs.org/safer-buffer/-/safer-buffer-2.1.2.tgz",
+      "integrity": "sha512-YZo3K82SD7Riyi0E1EQPojLz7kpepnSQI9IyPbHHg1XXXevb5dJI7tpyN2ADxGcQbHG7vcyRHk0cbwqcQriUtg==",
+      "dev": true
+    },
     "samsam": {
       "version": "1.1.2",
       "resolved": "https://registry.npmjs.org/samsam/-/samsam-1.1.2.tgz",
@@ -2015,6 +2121,12 @@
         "extend-shallow": "^3.0.0"
       }
     },
+    "sprintf-js": {
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/sprintf-js/-/sprintf-js-1.1.2.tgz",
+      "integrity": "sha512-VE0SOVEHCk7Qc8ulkWw3ntAzXuqf7S2lvwQaDLRnUeIEaKNQJzV6BwmLKhOqT61aGhfUMrXeaBk+oDGCzvhcug==",
+      "dev": true
+    },
     "static-extend": {
       "version": "0.1.2",
       "resolved": "https://registry.npmjs.org/static-extend/-/static-extend-0.1.2.tgz",
@@ -2121,10 +2233,14 @@
       "dev": true
     },
     "underscore.string": {
-      "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": "3.3.5",
+      "resolved": "https://registry.npmjs.org/underscore.string/-/underscore.string-3.3.5.tgz",
+      "integrity": "sha512-g+dpmgn+XBneLmXXo+sGlW5xQEt4ErkS3mgeN2GFbremYeMBSJKr9Wf2KJplQVaiPY/f7FN6atosWYNm9ovrYg==",
+      "dev": true,
+      "requires": {
+        "sprintf-js": "^1.0.3",
+        "util-deprecate": "^1.0.2"
+      }
     },
     "union-value": {
       "version": "1.0.1",
@@ -2214,6 +2330,12 @@
         "safe-buffer": "^5.1.2"
       }
     },
+    "util-deprecate": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
+      "integrity": "sha1-RQ1Nyfpw3nMnYvvS1KKJgUGaDM8=",
+      "dev": true
+    },
     "v8flags": {
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       "resolved": "https://registry.npmjs.org/v8flags/-/v8flags-3.1.3.tgz",
@@ -2224,9 +2346,18 @@
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-      "version": "1.0.9",
-      "resolved": "https://registry.npmjs.org/which/-/which-1.0.9.tgz",
-      "integrity": "sha1-RgwdoPgQED0DIam2M6+eV15kSG8=",
+      "version": "2.0.2",
+      "resolved": "https://registry.npmjs.org/which/-/which-2.0.2.tgz",
+      "integrity": "sha512-BLI3Tl1TW3Pvl70l3yq3Y64i+awpwXqsGBYWkkqMtnbXgrMD+yj7rhW0kuEDxzJaYXGjEW5ogapKNMEKNMjibA==",
+      "dev": true,
+      "requires": {
+        "isexe": "^2.0.0"
+      }
+    },
+    "wrappy": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
+      "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8=",
       "dev": true
     },
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diff --git a/package.json b/package.json
index d857a30..7972042 100644
--- a/package.json
+++ b/package.json
@@ -24,7 +24,7 @@
   "devDependencies": {
     "blanket": "^1.1.7",
     "chai": "^3.3.0",
-    "grunt": "^0.4.5",
+    "grunt": "^1.3.0",
     "grunt-cli": "^1.3.2",
     "grunt-contrib-clean": "^0.6.0",
     "grunt-contrib-watch": "^0.6.1",