diff --git a/package-lock.json b/package-lock.json
index c39eaa8..adab898 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -223,6 +223,14 @@
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@@ -1298,7 +1312,7 @@
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@@ -2123,9 +2137,9 @@
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@@ -2309,21 +2323,13 @@
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+      "resolved": "https://registry.npmjs.org/js-yaml/-/js-yaml-3.14.1.tgz",
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@@ -2447,16 +2453,6 @@
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@@ -2595,13 +2591,13 @@
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-      "resolved": "https://registry.npmjs.org/micromatch/-/micromatch-4.0.4.tgz",
-      "integrity": "sha512-pRmzw/XUcwXGpD9aI9q/0XOwLNygjETJ8y0ao0wdqprrzDa4YnxLcz7fQRZr8voh8V10kGhABbNcHVk5wHgWwg==",
+      "version": "4.0.5",
+      "resolved": "https://registry.npmjs.org/micromatch/-/micromatch-4.0.5.tgz",
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-        "braces": "^3.0.1",
-        "picomatch": "^2.2.3"
+        "braces": "^3.0.2",
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@@ -3526,9 +3522,9 @@
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@@ -3882,12 +3878,14 @@
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       "dev": true,
       "requires": {
-        "path-parse": "^1.0.6"
+        "is-core-module": "^2.8.1",
+        "path-parse": "^1.0.7",
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@@ -4084,9 +4082,9 @@
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-      "integrity": "sha1-BOaSb2YolTVPPdAVIDYzuFcpfiw=",
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/sprintf-js/-/sprintf-js-1.1.2.tgz",
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@@ -4175,6 +4173,12 @@
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       "integrity": "sha1-U10EXOa2Nj+kARcIRimZXp3zJMc="
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+    "supports-preserve-symlinks-flag": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/supports-preserve-symlinks-flag/-/supports-preserve-symlinks-flag-1.0.0.tgz",
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@@ -4412,12 +4416,12 @@
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       "dev": true,
       "requires": {
-        "sprintf-js": "^1.0.3",
+        "sprintf-js": "^1.1.1",
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diff --git a/package.json b/package.json
index 14d5005..6ff7a3f 100644
--- a/package.json
+++ b/package.json
@@ -3,7 +3,7 @@
   "main": "index.html",
   "version": "1.4.0",
   "devDependencies": {
-    "grunt": "^1.4.1",
+    "grunt": "^1.5.3",
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     "grunt-contrib-compress": "^1.5.0",