diff --git a/package-lock.json b/package-lock.json
index c9f8755..bbeceac 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -62,12 +62,12 @@
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@@ -103,6 +103,12 @@
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@@ -115,6 +121,12 @@
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@@ -354,6 +366,15 @@
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@@ -504,25 +524,19 @@
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@@ -748,14 +762,10 @@
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@@ -811,6 +821,12 @@
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@@ -1069,6 +1085,15 @@
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@@ -1184,6 +1209,15 @@
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@@ -1231,6 +1265,40 @@
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@@ -1368,9 +1436,9 @@
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@@ -1396,6 +1464,30 @@
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-        "has-flag": "^3.0.0"
+        "has-flag": "^4.0.0"
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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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@@ -4074,6 +4532,15 @@
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+    "to-regex-range": {
+      "version": "5.0.1",
+      "resolved": "https://registry.npmjs.org/to-regex-range/-/to-regex-range-5.0.1.tgz",
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+      "dev": true,
+      "requires": {
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@@ -4153,6 +4620,12 @@
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+      "version": "0.1.2",
+      "resolved": "https://registry.npmjs.org/unc-path-regex/-/unc-path-regex-0.1.2.tgz",
+      "integrity": "sha1-5z3T17DXxe2G+6xrCufYxqadUPo=",
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@@ -4160,12 +4633,12 @@
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-      "resolved": "https://registry.npmjs.org/underscore.string/-/underscore.string-3.3.5.tgz",
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+      "version": "3.3.6",
+      "resolved": "https://registry.npmjs.org/underscore.string/-/underscore.string-3.3.6.tgz",
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       "dev": true,
       "requires": {
-        "sprintf-js": "^1.0.3",
+        "sprintf-js": "^1.1.1",
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@@ -4214,6 +4687,15 @@
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+    "v8flags": {
+      "version": "3.2.0",
+      "resolved": "https://registry.npmjs.org/v8flags/-/v8flags-3.2.0.tgz",
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+      "dev": true,
+      "requires": {
+        "homedir-polyfill": "^1.0.1"
+      }
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     "validate-npm-package-license": {
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       "resolved": "https://registry.npmjs.org/validate-npm-package-license/-/validate-npm-package-license-3.0.4.tgz",
diff --git a/package.json b/package.json
old mode 100755
new mode 100644
index eaec2b2..d75e884
--- a/package.json
+++ b/package.json
@@ -24,7 +24,7 @@
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-    "grunt": "~1.0.1",
+    "grunt": "~1.5.3",
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     "grunt-cli": "~1.2.0",
     "grunt-contrib-connect": "~0.11.2",