diff --git a/package-lock.json b/package-lock.json
index 9d3966f..0889e05 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -16,7 +16,7 @@
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         "grunt-contrib-clean": "^2.0.0",
         "grunt-contrib-compress": "^2.0.0",
-        "grunt-contrib-concat": "^1.0.1",
+        "grunt-contrib-concat": "^2.0.0",
         "grunt-contrib-copy": "^1.0.0",
         "grunt-contrib-csslint": "^2.0.0",
         "grunt-contrib-cssmin": "^4.0.0",
@@ -2741,41 +2741,77 @@
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-      "version": "1.0.1",
-      "integrity": "sha1-YVCYYwhOhx1+ht5IwBUlntl3Rb0=",
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/grunt-contrib-concat/-/grunt-contrib-concat-2.0.0.tgz",
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       "dev": true,
       "dependencies": {
-        "chalk": "^1.0.0",
+        "chalk": "^4.1.2",
         "source-map": "^0.5.3"
       },
       "engines": {
-        "node": ">=0.10.0"
+        "node": ">=0.12.0"
       },
       "peerDependencies": {
-        "grunt": ">=0.4.0"
+        "grunt": ">=1.4.1"
       }
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     "node_modules/grunt-contrib-concat/node_modules/ansi-styles": {
-      "version": "2.2.1",
-      "integrity": "sha1-tDLdM1i2NM914eRmQ2gkBTPB3b4=",
+      "version": "4.3.0",
+      "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-4.3.0.tgz",
+      "integrity": "sha512-zbB9rCJAT1rbjiVDb2hqKFHNYLxgtk8NURxZ3IZwD3F6NtxbXZQCnnSi1Lkx+IDohdPlFp222wVALIheZJQSEg==",
       "dev": true,
+      "dependencies": {
+        "color-convert": "^2.0.1"
+      },
       "engines": {
-        "node": ">=0.10.0"
+        "node": ">=8"
+      },
+      "funding": {
+        "url": "https://github.com/chalk/ansi-styles?sponsor=1"
       }
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     "node_modules/grunt-contrib-concat/node_modules/chalk": {
-      "version": "1.1.3",
-      "integrity": "sha1-qBFcVeSnAv5NFQq9OHKCKn4J/Jg=",
+      "version": "4.1.2",
+      "resolved": "https://registry.npmjs.org/chalk/-/chalk-4.1.2.tgz",
+      "integrity": "sha512-oKnbhFyRIXpUuez8iBMmyEa4nbj4IOQyuhc/wy9kY7/WVPcwIO9VA668Pu8RkO7+0G76SLROeyw9CpQ061i4mA==",
       "dev": true,
       "dependencies": {
-        "ansi-styles": "^2.2.1",
-        "escape-string-regexp": "^1.0.2",
-        "has-ansi": "^2.0.0",
-        "strip-ansi": "^3.0.0",
-        "supports-color": "^2.0.0"
+        "ansi-styles": "^4.1.0",
+        "supports-color": "^7.1.0"
       },
       "engines": {
-        "node": ">=0.10.0"
+        "node": ">=10"
+      },
+      "funding": {
+        "url": "https://github.com/chalk/chalk?sponsor=1"
+      }
+    },
+    "node_modules/grunt-contrib-concat/node_modules/color-convert": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/color-convert/-/color-convert-2.0.1.tgz",
+      "integrity": "sha512-RRECPsj7iu/xb5oKYcsFHSppFNnsj/52OVTRKb4zP5onXwVF3zVmmToNcOfGC+CRDpfK/U584fMg38ZHCaElKQ==",
+      "dev": true,
+      "dependencies": {
+        "color-name": "~1.1.4"
+      },
+      "engines": {
+        "node": ">=7.0.0"
+      }
+    },
+    "node_modules/grunt-contrib-concat/node_modules/color-name": {
+      "version": "1.1.4",
+      "resolved": "https://registry.npmjs.org/color-name/-/color-name-1.1.4.tgz",
+      "integrity": "sha512-dOy+3AuW3a2wNbZHIuMZpTcgjGuLU/uBL/ubcZF9OXbDo8ff4O8yVp5Bf0efS8uEoYo5q4Fx7dY9OgQGXgAsQA==",
+      "dev": true
+    },
+    "node_modules/grunt-contrib-concat/node_modules/has-flag": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/has-flag/-/has-flag-4.0.0.tgz",
+      "integrity": "sha512-EykJT/Q1KjTWctppgIAgfSO0tKVuZUjhgMr17kqTumMl6Afv3EISleU7qZUzoXDFTAHTDC4NOoG/ZxU3EvlMPQ==",
+      "dev": true,
+      "engines": {
+        "node": ">=8"
       }
     },
     "node_modules/grunt-contrib-concat/node_modules/source-map": {
@@ -2787,11 +2823,15 @@
       }
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     "node_modules/grunt-contrib-concat/node_modules/supports-color": {
-      "version": "2.0.0",
-      "integrity": "sha1-U10EXOa2Nj+kARcIRimZXp3zJMc=",
+      "version": "7.2.0",
+      "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-7.2.0.tgz",
+      "integrity": "sha512-qpCAvRl9stuOHveKsn7HncJRvv501qIacKzQlO/+Lwxc9+0q2wLyv4Dfvt80/DPn2pqOBsJdDiogXGR9+OvwRw==",
       "dev": true,
+      "dependencies": {
+        "has-flag": "^4.0.0"
+      },
       "engines": {
-        "node": ">=0.8.0"
+        "node": ">=8"
       }
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     "node_modules/grunt-contrib-copy": {
@@ -10534,40 +10574,68 @@
       }
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     "grunt-contrib-concat": {
-      "version": "1.0.1",
-      "integrity": "sha1-YVCYYwhOhx1+ht5IwBUlntl3Rb0=",
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/grunt-contrib-concat/-/grunt-contrib-concat-2.0.0.tgz",
+      "integrity": "sha512-/cfWwsGiprVTOl7c2bZwMdQ8hIf3e1f4szm1i7qhY9hOnR/X2KL+Xe7dynNweTYHa6aWPZx2B5GPsUpxAXNCaA==",
       "dev": true,
       "requires": {
-        "chalk": "^1.0.0",
+        "chalk": "^4.1.2",
         "source-map": "^0.5.3"
       },
       "dependencies": {
         "ansi-styles": {
-          "version": "2.2.1",
-          "integrity": "sha1-tDLdM1i2NM914eRmQ2gkBTPB3b4=",
-          "dev": true
-        },
-        "chalk": {
-          "version": "1.1.3",
-          "integrity": "sha1-qBFcVeSnAv5NFQq9OHKCKn4J/Jg=",
+          "version": "4.3.0",
+          "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-4.3.0.tgz",
+          "integrity": "sha512-zbB9rCJAT1rbjiVDb2hqKFHNYLxgtk8NURxZ3IZwD3F6NtxbXZQCnnSi1Lkx+IDohdPlFp222wVALIheZJQSEg==",
           "dev": true,
           "requires": {
-            "ansi-styles": "^2.2.1",
-            "escape-string-regexp": "^1.0.2",
-            "has-ansi": "^2.0.0",
-            "strip-ansi": "^3.0.0",
-            "supports-color": "^2.0.0"
+            "color-convert": "^2.0.1"
           }
         },
+        "chalk": {
+          "version": "4.1.2",
+          "resolved": "https://registry.npmjs.org/chalk/-/chalk-4.1.2.tgz",
+          "integrity": "sha512-oKnbhFyRIXpUuez8iBMmyEa4nbj4IOQyuhc/wy9kY7/WVPcwIO9VA668Pu8RkO7+0G76SLROeyw9CpQ061i4mA==",
+          "dev": true,
+          "requires": {
+            "ansi-styles": "^4.1.0",
+            "supports-color": "^7.1.0"
+          }
+        },
+        "color-convert": {
+          "version": "2.0.1",
+          "resolved": "https://registry.npmjs.org/color-convert/-/color-convert-2.0.1.tgz",
+          "integrity": "sha512-RRECPsj7iu/xb5oKYcsFHSppFNnsj/52OVTRKb4zP5onXwVF3zVmmToNcOfGC+CRDpfK/U584fMg38ZHCaElKQ==",
+          "dev": true,
+          "requires": {
+            "color-name": "~1.1.4"
+          }
+        },
+        "color-name": {
+          "version": "1.1.4",
+          "resolved": "https://registry.npmjs.org/color-name/-/color-name-1.1.4.tgz",
+          "integrity": "sha512-dOy+3AuW3a2wNbZHIuMZpTcgjGuLU/uBL/ubcZF9OXbDo8ff4O8yVp5Bf0efS8uEoYo5q4Fx7dY9OgQGXgAsQA==",
+          "dev": true
+        },
+        "has-flag": {
+          "version": "4.0.0",
+          "resolved": "https://registry.npmjs.org/has-flag/-/has-flag-4.0.0.tgz",
+          "integrity": "sha512-EykJT/Q1KjTWctppgIAgfSO0tKVuZUjhgMr17kqTumMl6Afv3EISleU7qZUzoXDFTAHTDC4NOoG/ZxU3EvlMPQ==",
+          "dev": true
+        },
         "source-map": {
           "version": "0.5.7",
           "integrity": "sha1-igOdLRAh0i0eoUyA2OpGi6LvP8w=",
           "dev": true
         },
         "supports-color": {
-          "version": "2.0.0",
-          "integrity": "sha1-U10EXOa2Nj+kARcIRimZXp3zJMc=",
-          "dev": true
+          "version": "7.2.0",
+          "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-7.2.0.tgz",
+          "integrity": "sha512-qpCAvRl9stuOHveKsn7HncJRvv501qIacKzQlO/+Lwxc9+0q2wLyv4Dfvt80/DPn2pqOBsJdDiogXGR9+OvwRw==",
+          "dev": true,
+          "requires": {
+            "has-flag": "^4.0.0"
+          }
         }
       }
     },
diff --git a/package.json b/package.json
index 2d860bd..6a804d2 100644
--- a/package.json
+++ b/package.json
@@ -23,7 +23,7 @@
     "grunt-cli": "^1.2.0",
     "grunt-contrib-clean": "^2.0.0",
     "grunt-contrib-compress": "^2.0.0",
-    "grunt-contrib-concat": "^1.0.1",
+    "grunt-contrib-concat": "^2.0.0",
     "grunt-contrib-copy": "^1.0.0",
     "grunt-contrib-csslint": "^2.0.0",
     "grunt-contrib-cssmin": "^4.0.0",