diff --git a/package-lock.json b/package-lock.json
index 3606881..c8a1284 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -9,7 +9,7 @@
       "version": "1.2.2",
       "devDependencies": {
         "cheerio": "^1.0.0-rc.9",
-        "grunt": "^1.4.0",
+        "grunt": "^1.5.2",
         "grunt-banner": "^0.6.0",
         "grunt-cli": "^1.4.2",
         "grunt-contrib-clean": "^2.0.0",
@@ -1179,9 +1179,9 @@
       "dev": true
     },
     "node_modules/grunt": {
-      "version": "1.4.0",
-      "resolved": "https://registry.npmjs.org/grunt/-/grunt-1.4.0.tgz",
-      "integrity": "sha512-yRFc0GVCDu9yxqOFzpuXQ2pEdgtLDnFv5Qz54jfIcNnpJ8Z7B7P7kPkT4VMuRvm+N+QOsI8C4v/Q0DSaoj3LgQ==",
+      "version": "1.5.2",
+      "resolved": "https://registry.npmjs.org/grunt/-/grunt-1.5.2.tgz",
+      "integrity": "sha512-XCtfaIu72OyDqK24MjWiGC9SwlkuhkS1mrULr1xzuJ2XqAFhP3ZAchZGHJeSCY6mkaOXU4F7SbmmCF7xIVoC9w==",
       "dev": true,
       "dependencies": {
         "dateformat": "~3.0.3",
@@ -1189,8 +1189,8 @@
         "exit": "~0.1.2",
         "findup-sync": "~0.3.0",
         "glob": "~7.1.6",
-        "grunt-cli": "~1.4.2",
-        "grunt-known-options": "~1.1.1",
+        "grunt-cli": "~1.4.3",
+        "grunt-known-options": "~2.0.0",
         "grunt-legacy-log": "~3.0.0",
         "grunt-legacy-util": "~2.0.1",
         "iconv-lite": "~0.4.13",
@@ -1223,12 +1223,12 @@
       }
     },
     "node_modules/grunt-cli": {
-      "version": "1.4.2",
-      "resolved": "https://registry.npmjs.org/grunt-cli/-/grunt-cli-1.4.2.tgz",
-      "integrity": "sha512-wsu6BZh7KCnfeaSkDrKIAvOlqGKxNRTZjc8xfZlvxCByQIqUfZ31kh5uHpPnhQ4NdVgvaWaVxa1LUbVU80nACw==",
+      "version": "1.4.3",
+      "resolved": "https://registry.npmjs.org/grunt-cli/-/grunt-cli-1.4.3.tgz",
+      "integrity": "sha512-9Dtx/AhVeB4LYzsViCjUQkd0Kw0McN2gYpdmGYKtE2a5Yt7v1Q+HYZVWhqXc/kGnxlMtqKDxSwotiGeFmkrCoQ==",
       "dev": true,
       "dependencies": {
-        "grunt-known-options": "~1.1.1",
+        "grunt-known-options": "~2.0.0",
         "interpret": "~1.1.0",
         "liftup": "~3.0.1",
         "nopt": "~4.0.1",
@@ -1698,9 +1698,9 @@
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     "node_modules/grunt-known-options": {
-      "version": "1.1.1",
-      "resolved": "https://registry.npmjs.org/grunt-known-options/-/grunt-known-options-1.1.1.tgz",
-      "integrity": "sha512-cHwsLqoighpu7TuYj5RonnEuxGVFnztcUqTqp5rXFGYL4OuPFofwC4Ycg7n9fYwvK6F5WbYgeVOwph9Crs2fsQ==",
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/grunt-known-options/-/grunt-known-options-2.0.0.tgz",
+      "integrity": "sha512-GD7cTz0I4SAede1/+pAbmJRG44zFLPipVtdL9o3vqx9IEyb7b4/Y3s7r6ofI3CchR5GvYJ+8buCSioDv5dQLiA==",
       "dev": true,
       "engines": {
         "node": ">=0.10.0"
@@ -5061,9 +5061,9 @@
       "dev": true
     },
     "grunt": {
-      "version": "1.4.0",
-      "resolved": "https://registry.npmjs.org/grunt/-/grunt-1.4.0.tgz",
-      "integrity": "sha512-yRFc0GVCDu9yxqOFzpuXQ2pEdgtLDnFv5Qz54jfIcNnpJ8Z7B7P7kPkT4VMuRvm+N+QOsI8C4v/Q0DSaoj3LgQ==",
+      "version": "1.5.2",
+      "resolved": "https://registry.npmjs.org/grunt/-/grunt-1.5.2.tgz",
+      "integrity": "sha512-XCtfaIu72OyDqK24MjWiGC9SwlkuhkS1mrULr1xzuJ2XqAFhP3ZAchZGHJeSCY6mkaOXU4F7SbmmCF7xIVoC9w==",
       "dev": true,
       "requires": {
         "dateformat": "~3.0.3",
@@ -5071,8 +5071,8 @@
         "exit": "~0.1.2",
         "findup-sync": "~0.3.0",
         "glob": "~7.1.6",
-        "grunt-cli": "~1.4.2",
-        "grunt-known-options": "~1.1.1",
+        "grunt-cli": "~1.4.3",
+        "grunt-known-options": "~2.0.0",
         "grunt-legacy-log": "~3.0.0",
         "grunt-legacy-util": "~2.0.1",
         "iconv-lite": "~0.4.13",
@@ -5093,12 +5093,12 @@
       }
     },
     "grunt-cli": {
-      "version": "1.4.2",
-      "resolved": "https://registry.npmjs.org/grunt-cli/-/grunt-cli-1.4.2.tgz",
-      "integrity": "sha512-wsu6BZh7KCnfeaSkDrKIAvOlqGKxNRTZjc8xfZlvxCByQIqUfZ31kh5uHpPnhQ4NdVgvaWaVxa1LUbVU80nACw==",
+      "version": "1.4.3",
+      "resolved": "https://registry.npmjs.org/grunt-cli/-/grunt-cli-1.4.3.tgz",
+      "integrity": "sha512-9Dtx/AhVeB4LYzsViCjUQkd0Kw0McN2gYpdmGYKtE2a5Yt7v1Q+HYZVWhqXc/kGnxlMtqKDxSwotiGeFmkrCoQ==",
       "dev": true,
       "requires": {
-        "grunt-known-options": "~1.1.1",
+        "grunt-known-options": "~2.0.0",
         "interpret": "~1.1.0",
         "liftup": "~3.0.1",
         "nopt": "~4.0.1",
@@ -5459,9 +5459,9 @@
       }
     },
     "grunt-known-options": {
-      "version": "1.1.1",
-      "resolved": "https://registry.npmjs.org/grunt-known-options/-/grunt-known-options-1.1.1.tgz",
-      "integrity": "sha512-cHwsLqoighpu7TuYj5RonnEuxGVFnztcUqTqp5rXFGYL4OuPFofwC4Ycg7n9fYwvK6F5WbYgeVOwph9Crs2fsQ==",
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/grunt-known-options/-/grunt-known-options-2.0.0.tgz",
+      "integrity": "sha512-GD7cTz0I4SAede1/+pAbmJRG44zFLPipVtdL9o3vqx9IEyb7b4/Y3s7r6ofI3CchR5GvYJ+8buCSioDv5dQLiA==",
       "dev": true
     },
     "grunt-legacy-log": {
diff --git a/package.json b/package.json
index 8bc8b33..5d491a1 100644
--- a/package.json
+++ b/package.json
@@ -23,7 +23,7 @@
   ],
   "devDependencies": {
     "cheerio": "^1.0.0-rc.9",
-    "grunt": "^1.4.0",
+    "grunt": "^1.5.2",
     "grunt-banner": "^0.6.0",
     "grunt-cli": "^1.4.2",
     "grunt-contrib-clean": "^2.0.0",