diff --git a/package-lock.json b/package-lock.json
index 4dc95ff..d5e0c13 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -6,7 +6,7 @@
     "": {
       "name": "so-simple-theme",
       "devDependencies": {
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+        "grunt": "1.5.3",
         "grunt-contrib-clean": "2.0.0",
         "grunt-contrib-imagemin": "4.0.0",
         "grunt-contrib-jshint": "3.0.0",
@@ -2732,9 +2732,9 @@
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-      "resolved": "https://registry.npmjs.org/grunt/-/grunt-1.4.0.tgz",
-      "integrity": "sha512-yRFc0GVCDu9yxqOFzpuXQ2pEdgtLDnFv5Qz54jfIcNnpJ8Z7B7P7kPkT4VMuRvm+N+QOsI8C4v/Q0DSaoj3LgQ==",
+      "version": "1.5.3",
+      "resolved": "https://registry.npmjs.org/grunt/-/grunt-1.5.3.tgz",
+      "integrity": "sha512-mKwmo4X2d8/4c/BmcOETHek675uOqw0RuA/zy12jaspWqvTp4+ZeQF1W+OTpcbncnaBsfbQJ6l0l4j+Sn/GmaQ==",
       "dev": true,
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@@ -2742,8 +2742,8 @@
         "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",
@@ -2779,15 +2779,6 @@
         "node": ">=10"
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-    "node_modules/grunt-cli/node_modules/grunt-known-options": {
-      "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"
-      }
-    },
     "node_modules/grunt-cli/node_modules/nopt": {
       "version": "4.0.3",
       "resolved": "https://registry.npmjs.org/nopt/-/nopt-4.0.3.tgz",
@@ -2966,9 +2957,9 @@
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-      "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"
@@ -9146,9 +9137,9 @@
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     "grunt": {
-      "version": "1.4.0",
-      "resolved": "https://registry.npmjs.org/grunt/-/grunt-1.4.0.tgz",
-      "integrity": "sha512-yRFc0GVCDu9yxqOFzpuXQ2pEdgtLDnFv5Qz54jfIcNnpJ8Z7B7P7kPkT4VMuRvm+N+QOsI8C4v/Q0DSaoj3LgQ==",
+      "version": "1.5.3",
+      "resolved": "https://registry.npmjs.org/grunt/-/grunt-1.5.3.tgz",
+      "integrity": "sha512-mKwmo4X2d8/4c/BmcOETHek675uOqw0RuA/zy12jaspWqvTp4+ZeQF1W+OTpcbncnaBsfbQJ6l0l4j+Sn/GmaQ==",
       "dev": true,
       "requires": {
         "dateformat": "~3.0.3",
@@ -9156,8 +9147,8 @@
         "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",
@@ -9181,12 +9172,6 @@
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       },
       "dependencies": {
-        "grunt-known-options": {
-          "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
-        },
         "nopt": {
           "version": "4.0.3",
           "resolved": "https://registry.npmjs.org/nopt/-/nopt-4.0.3.tgz",
@@ -9324,9 +9309,9 @@
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     "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 7dd1370..f02800f 100644
--- a/package.json
+++ b/package.json
@@ -13,7 +13,7 @@
     "node": ">= 0.10.0"
   },
   "devDependencies": {
-    "grunt": "1.4.0",
+    "grunt": "1.5.3",
     "grunt-contrib-clean": "2.0.0",
     "grunt-contrib-imagemin": "4.0.0",
     "grunt-contrib-jshint": "3.0.0",