diff --git a/package-lock.json b/package-lock.json
index 1eea5e3..50bd89a 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -16,7 +16,7 @@
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         "grunt-contrib-connect": "~3.0.0",
         "grunt-contrib-copy": "~1.0.0",
-        "grunt-contrib-cssmin": "~4.0.0",
+        "grunt-contrib-cssmin": "~5.0.0",
         "grunt-contrib-htmlmin": "~3.1.0",
         "grunt-contrib-imagemin": "~4.0.0",
         "grunt-contrib-jshint": "~3.2.0",
@@ -1172,9 +1172,9 @@
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-      "resolved": "https://registry.npmjs.org/clean-css/-/clean-css-5.1.3.tgz",
-      "integrity": "sha512-qGXzUCDpLwAlPx0kYeU4QXjzQIcIYZbJjD4FNm7NnSjoP0hYMVZhHOpUYJ6AwfkMX2cceLRq54MeCgHy/va1cA==",
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+      "resolved": "https://registry.npmjs.org/clean-css/-/clean-css-5.3.2.tgz",
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@@ -3672,17 +3672,17 @@
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-      "resolved": "https://registry.npmjs.org/grunt-contrib-cssmin/-/grunt-contrib-cssmin-4.0.0.tgz",
-      "integrity": "sha512-jXU+Zlk8Q8XztOGNGpjYlD/BDQ0n95IHKrQKtFR7Gd8hZrzgqiG1Ra7cGYc8h2DD9vkSFGNlweb9Q00rBxOK2w==",
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/grunt-contrib-cssmin/-/grunt-contrib-cssmin-5.0.0.tgz",
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       "dev": true,
       "dependencies": {
-        "chalk": "^4.1.0",
-        "clean-css": "^5.0.1",
+        "chalk": "^4.1.2",
+        "clean-css": "^5.3.2",
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@@ -3701,9 +3701,9 @@
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-      "resolved": "https://registry.npmjs.org/chalk/-/chalk-4.1.1.tgz",
-      "integrity": "sha512-diHzdDKxcU+bAsUboHLPEDQiw0qEe0qd7SYUn3HgcFlWgbDcfLGswOHYeGrHKzG9z6UYf01d9VFMfZxPM1xZSg==",
+      "version": "4.1.2",
+      "resolved": "https://registry.npmjs.org/chalk/-/chalk-4.1.2.tgz",
+      "integrity": "sha512-oKnbhFyRIXpUuez8iBMmyEa4nbj4IOQyuhc/wy9kY7/WVPcwIO9VA668Pu8RkO7+0G76SLROeyw9CpQ061i4mA==",
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@@ -10524,9 +10524,9 @@
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-      "resolved": "https://registry.npmjs.org/clean-css/-/clean-css-5.1.3.tgz",
-      "integrity": "sha512-qGXzUCDpLwAlPx0kYeU4QXjzQIcIYZbJjD4FNm7NnSjoP0hYMVZhHOpUYJ6AwfkMX2cceLRq54MeCgHy/va1cA==",
+      "version": "5.3.2",
+      "resolved": "https://registry.npmjs.org/clean-css/-/clean-css-5.3.2.tgz",
+      "integrity": "sha512-JVJbM+f3d3Q704rF4bqQ5UUyTtuJ0JRKNbTKVEeujCCBoMdkEi+V+e8oktO9qGQNSvHrFTM6JZRXrUvGR1czww==",
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@@ -12549,13 +12549,13 @@
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-      "resolved": "https://registry.npmjs.org/grunt-contrib-cssmin/-/grunt-contrib-cssmin-4.0.0.tgz",
-      "integrity": "sha512-jXU+Zlk8Q8XztOGNGpjYlD/BDQ0n95IHKrQKtFR7Gd8hZrzgqiG1Ra7cGYc8h2DD9vkSFGNlweb9Q00rBxOK2w==",
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/grunt-contrib-cssmin/-/grunt-contrib-cssmin-5.0.0.tgz",
+      "integrity": "sha512-SNp4H4+85mm2xaHYi83FBHuOXylpi5vcwgtNoYCZBbkgeXQXoeTAKa59VODRb0woTDBvxouP91Ff5PzCkikg6g==",
       "dev": true,
       "requires": {
-        "chalk": "^4.1.0",
-        "clean-css": "^5.0.1",
+        "chalk": "^4.1.2",
+        "clean-css": "^5.3.2",
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@@ -12569,9 +12569,9 @@
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-          "resolved": "https://registry.npmjs.org/chalk/-/chalk-4.1.1.tgz",
-          "integrity": "sha512-diHzdDKxcU+bAsUboHLPEDQiw0qEe0qd7SYUn3HgcFlWgbDcfLGswOHYeGrHKzG9z6UYf01d9VFMfZxPM1xZSg==",
+          "version": "4.1.2",
+          "resolved": "https://registry.npmjs.org/chalk/-/chalk-4.1.2.tgz",
+          "integrity": "sha512-oKnbhFyRIXpUuez8iBMmyEa4nbj4IOQyuhc/wy9kY7/WVPcwIO9VA668Pu8RkO7+0G76SLROeyw9CpQ061i4mA==",
           "dev": true,
           "requires": {
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diff --git a/package.json b/package.json
index cdf1d09..f4f84e8 100644
--- a/package.json
+++ b/package.json
@@ -9,7 +9,7 @@
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     "grunt-contrib-connect": "~3.0.0",
     "grunt-contrib-copy": "~1.0.0",
-    "grunt-contrib-cssmin": "~4.0.0",
+    "grunt-contrib-cssmin": "~5.0.0",
     "grunt-contrib-htmlmin": "~3.1.0",
     "grunt-contrib-imagemin": "~4.0.0",
     "grunt-contrib-jshint": "~3.2.0",