diff --git a/package-lock.json b/package-lock.json
index 33feadf5..a245f7b2 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -40,7 +40,7 @@
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         "imagemin-optipng": "^8.0.0",
         "imagemin-svgo": "^8.0.0",
-        "postcss": "^7.0.36",
+        "postcss": "^8.4.21",
         "postcss-flexbugs-fixes": "^4.1.0",
         "prettier": "^1.16.4",
         "sass": "^1.18.0",
@@ -1949,6 +1949,38 @@
         "node": ">=6.0.0"
       }
     },
+    "node_modules/autoprefixer/node_modules/picocolors": {
+      "version": "0.2.1",
+      "resolved": "https://registry.npmjs.org/picocolors/-/picocolors-0.2.1.tgz",
+      "integrity": "sha512-cMlDqaLEqfSaW8Z7N5Jw+lyIW869EzT73/F5lhtY9cLGoVxSXznfgfXMO0Z5K0o0Q2TkTXq+0KFsdnSe3jDViA==",
+      "dev": true
+    },
+    "node_modules/autoprefixer/node_modules/postcss": {
+      "version": "7.0.39",
+      "resolved": "https://registry.npmjs.org/postcss/-/postcss-7.0.39.tgz",
+      "integrity": "sha512-yioayjNbHn6z1/Bywyb2Y4s3yvDAeXGOyxqD+LnVOinq6Mdmd++SW2wUNVzavyyHxd6+DxzWGIuosg6P1Rj8uA==",
+      "dev": true,
+      "dependencies": {
+        "picocolors": "^0.2.1",
+        "source-map": "^0.6.1"
+      },
+      "engines": {
+        "node": ">=6.0.0"
+      },
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/postcss/"
+      }
+    },
+    "node_modules/autoprefixer/node_modules/source-map": {
+      "version": "0.6.1",
+      "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.6.1.tgz",
+      "integrity": "sha512-UjgapumWlbMhkBgzT7Ykc5YXUT46F0iKu8SGXq0bcwP5dz/h0Plj6enJqjz1Zbq2l5WaqYnrVbwWOWMyF3F47g==",
+      "dev": true,
+      "engines": {
+        "node": ">=0.10.0"
+      }
+    },
     "node_modules/babel-loader": {
       "version": "8.0.5",
       "resolved": "https://registry.npmjs.org/babel-loader/-/babel-loader-8.0.5.tgz",
@@ -6544,6 +6576,18 @@
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       "optional": true
     },
+    "node_modules/nanoid": {
+      "version": "3.3.4",
+      "resolved": "https://registry.npmjs.org/nanoid/-/nanoid-3.3.4.tgz",
+      "integrity": "sha512-MqBkQh/OHTS2egovRtLk45wEyNXwF+cokD+1YPf9u5VfJiRdAiRwB2froX5Co9Rh20xs4siNPm8naNotSD6RBw==",
+      "dev": true,
+      "bin": {
+        "nanoid": "bin/nanoid.cjs"
+      },
+      "engines": {
+        "node": "^10 || ^12 || ^13.7 || ^14 || >=15.0.1"
+      }
+    },
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       "version": "1.2.13",
       "resolved": "https://registry.npmjs.org/nanomatch/-/nanomatch-1.2.13.tgz",
@@ -7279,6 +7323,12 @@
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       "dev": true
     },
+    "node_modules/picocolors": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/picocolors/-/picocolors-1.0.0.tgz",
+      "integrity": "sha512-1fygroTLlHu66zi26VoTDv8yRgm0Fccecssto+MhsZ0D/DGW2sm8E8AjW7NU5VVTRt5GxbeZ5qBuJr+HyLYkjQ==",
+      "dev": true
+    },
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       "version": "2.0.7",
       "resolved": "https://registry.npmjs.org/picomatch/-/picomatch-2.0.7.tgz",
@@ -7352,21 +7402,27 @@
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-      "version": "7.0.36",
-      "resolved": "https://registry.npmjs.org/postcss/-/postcss-7.0.36.tgz",
-      "integrity": "sha512-BebJSIUMwJHRH0HAQoxN4u1CN86glsrwsW0q7T+/m44eXOUAxSNdHRkNZPYz5vVUbg17hFgOQDE7fZk7li3pZw==",
+      "version": "8.4.21",
+      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.4.21.tgz",
+      "integrity": "sha512-tP7u/Sn/dVxK2NnruI4H9BG+x+Wxz6oeZ1cJ8P6G/PZY0IKk4k/63TDsQf2kQq3+qoJeLm2kIBUNlZe3zgb4Zg==",
       "dev": true,
+      "funding": [
+        {
+          "type": "opencollective",
+          "url": "https://opencollective.com/postcss/"
+        },
+        {
+          "type": "tidelift",
+          "url": "https://tidelift.com/funding/github/npm/postcss"
+        }
+      ],
       "dependencies": {
-        "chalk": "^2.4.2",
-        "source-map": "^0.6.1",
-        "supports-color": "^6.1.0"
+        "nanoid": "^3.3.4",
+        "picocolors": "^1.0.0",
+        "source-map-js": "^1.0.2"
       },
       "engines": {
-        "node": ">=6.0.0"
-      },
-      "funding": {
-        "type": "opencollective",
-        "url": "https://opencollective.com/postcss/"
+        "node": "^10 || ^12 || >=14"
       }
     },
     "node_modules/postcss-flexbugs-fixes": {
@@ -7378,13 +7434,30 @@
         "postcss": "^7.0.0"
       }
     },
-    "node_modules/postcss-value-parser": {
-      "version": "3.3.1",
-      "resolved": "https://registry.npmjs.org/postcss-value-parser/-/postcss-value-parser-3.3.1.tgz",
-      "integrity": "sha512-pISE66AbVkp4fDQ7VHBwRNXzAAKJjw4Vw7nWI/+Q3vuly7SNfgYXvm6i5IgFylHGK5sP/xHAbB7N49OS4gWNyQ==",
+    "node_modules/postcss-flexbugs-fixes/node_modules/picocolors": {
+      "version": "0.2.1",
+      "resolved": "https://registry.npmjs.org/picocolors/-/picocolors-0.2.1.tgz",
+      "integrity": "sha512-cMlDqaLEqfSaW8Z7N5Jw+lyIW869EzT73/F5lhtY9cLGoVxSXznfgfXMO0Z5K0o0Q2TkTXq+0KFsdnSe3jDViA==",
       "dev": true
     },
-    "node_modules/postcss/node_modules/source-map": {
+    "node_modules/postcss-flexbugs-fixes/node_modules/postcss": {
+      "version": "7.0.39",
+      "resolved": "https://registry.npmjs.org/postcss/-/postcss-7.0.39.tgz",
+      "integrity": "sha512-yioayjNbHn6z1/Bywyb2Y4s3yvDAeXGOyxqD+LnVOinq6Mdmd++SW2wUNVzavyyHxd6+DxzWGIuosg6P1Rj8uA==",
+      "dev": true,
+      "dependencies": {
+        "picocolors": "^0.2.1",
+        "source-map": "^0.6.1"
+      },
+      "engines": {
+        "node": ">=6.0.0"
+      },
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/postcss/"
+      }
+    },
+    "node_modules/postcss-flexbugs-fixes/node_modules/source-map": {
       "version": "0.6.1",
       "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.6.1.tgz",
       "integrity": "sha512-UjgapumWlbMhkBgzT7Ykc5YXUT46F0iKu8SGXq0bcwP5dz/h0Plj6enJqjz1Zbq2l5WaqYnrVbwWOWMyF3F47g==",
@@ -7393,6 +7466,12 @@
         "node": ">=0.10.0"
       }
     },
+    "node_modules/postcss-value-parser": {
+      "version": "3.3.1",
+      "resolved": "https://registry.npmjs.org/postcss-value-parser/-/postcss-value-parser-3.3.1.tgz",
+      "integrity": "sha512-pISE66AbVkp4fDQ7VHBwRNXzAAKJjw4Vw7nWI/+Q3vuly7SNfgYXvm6i5IgFylHGK5sP/xHAbB7N49OS4gWNyQ==",
+      "dev": true
+    },
     "node_modules/preact": {
       "version": "8.4.2",
       "resolved": "https://registry.npmjs.org/preact/-/preact-8.4.2.tgz",
@@ -8281,6 +8360,15 @@
         "node": ">=0.10.0"
       }
     },
+    "node_modules/source-map-js": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/source-map-js/-/source-map-js-1.0.2.tgz",
+      "integrity": "sha512-R0XvVJ9WusLiqTCEiGCmICCMplcCkIwwR11mOSD9CR5u+IXYdiseeEuXCVAjS54zqwkLcPNnmU4OeJ6tUrWhDw==",
+      "dev": true,
+      "engines": {
+        "node": ">=0.10.0"
+      }
+    },
     "node_modules/source-map-resolve": {
       "version": "0.5.3",
       "resolved": "https://registry.npmjs.org/source-map-resolve/-/source-map-resolve-0.5.3.tgz",
@@ -8800,18 +8888,6 @@
         "node": ">=0.10.0"
       }
     },
-    "node_modules/supports-color": {
-      "version": "6.1.0",
-      "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-6.1.0.tgz",
-      "integrity": "sha512-qe1jfm1Mg7Nq/NSh6XE24gPXROEVsWHxC1LIx//XNlD9iw7YZQGjZNjYN7xGaEG6iKdA8EtNFW6R0gjnVXp+wQ==",
-      "dev": true,
-      "dependencies": {
-        "has-flag": "^3.0.0"
-      },
-      "engines": {
-        "node": ">=6"
-      }
-    },
     "node_modules/svgo": {
       "version": "1.3.2",
       "resolved": "https://registry.npmjs.org/svgo/-/svgo-1.3.2.tgz",
@@ -11529,6 +11605,30 @@
         "num2fraction": "^1.2.2",
         "postcss": "^7.0.14",
         "postcss-value-parser": "^3.3.1"
+      },
+      "dependencies": {
+        "picocolors": {
+          "version": "0.2.1",
+          "resolved": "https://registry.npmjs.org/picocolors/-/picocolors-0.2.1.tgz",
+          "integrity": "sha512-cMlDqaLEqfSaW8Z7N5Jw+lyIW869EzT73/F5lhtY9cLGoVxSXznfgfXMO0Z5K0o0Q2TkTXq+0KFsdnSe3jDViA==",
+          "dev": true
+        },
+        "postcss": {
+          "version": "7.0.39",
+          "resolved": "https://registry.npmjs.org/postcss/-/postcss-7.0.39.tgz",
+          "integrity": "sha512-yioayjNbHn6z1/Bywyb2Y4s3yvDAeXGOyxqD+LnVOinq6Mdmd++SW2wUNVzavyyHxd6+DxzWGIuosg6P1Rj8uA==",
+          "dev": true,
+          "requires": {
+            "picocolors": "^0.2.1",
+            "source-map": "^0.6.1"
+          }
+        },
+        "source-map": {
+          "version": "0.6.1",
+          "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.6.1.tgz",
+          "integrity": "sha512-UjgapumWlbMhkBgzT7Ykc5YXUT46F0iKu8SGXq0bcwP5dz/h0Plj6enJqjz1Zbq2l5WaqYnrVbwWOWMyF3F47g==",
+          "dev": true
+        }
       }
     },
     "babel-loader": {
@@ -15306,6 +15406,12 @@
       "dev": true,
       "optional": true
     },
+    "nanoid": {
+      "version": "3.3.4",
+      "resolved": "https://registry.npmjs.org/nanoid/-/nanoid-3.3.4.tgz",
+      "integrity": "sha512-MqBkQh/OHTS2egovRtLk45wEyNXwF+cokD+1YPf9u5VfJiRdAiRwB2froX5Co9Rh20xs4siNPm8naNotSD6RBw==",
+      "dev": true
+    },
     "nanomatch": {
       "version": "1.2.13",
       "resolved": "https://registry.npmjs.org/nanomatch/-/nanomatch-1.2.13.tgz",
@@ -15882,6 +15988,12 @@
       "integrity": "sha1-elfrVQpng/kRUzH89GY9XI4AelA=",
       "dev": true
     },
+    "picocolors": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/picocolors/-/picocolors-1.0.0.tgz",
+      "integrity": "sha512-1fygroTLlHu66zi26VoTDv8yRgm0Fccecssto+MhsZ0D/DGW2sm8E8AjW7NU5VVTRt5GxbeZ5qBuJr+HyLYkjQ==",
+      "dev": true
+    },
     "picomatch": {
       "version": "2.0.7",
       "resolved": "https://registry.npmjs.org/picomatch/-/picomatch-2.0.7.tgz",
@@ -15936,22 +16048,14 @@
       "dev": true
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     "postcss": {
-      "version": "7.0.36",
-      "resolved": "https://registry.npmjs.org/postcss/-/postcss-7.0.36.tgz",
-      "integrity": "sha512-BebJSIUMwJHRH0HAQoxN4u1CN86glsrwsW0q7T+/m44eXOUAxSNdHRkNZPYz5vVUbg17hFgOQDE7fZk7li3pZw==",
+      "version": "8.4.21",
+      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.4.21.tgz",
+      "integrity": "sha512-tP7u/Sn/dVxK2NnruI4H9BG+x+Wxz6oeZ1cJ8P6G/PZY0IKk4k/63TDsQf2kQq3+qoJeLm2kIBUNlZe3zgb4Zg==",
       "dev": true,
       "requires": {
-        "chalk": "^2.4.2",
-        "source-map": "^0.6.1",
-        "supports-color": "^6.1.0"
-      },
-      "dependencies": {
-        "source-map": {
-          "version": "0.6.1",
-          "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.6.1.tgz",
-          "integrity": "sha512-UjgapumWlbMhkBgzT7Ykc5YXUT46F0iKu8SGXq0bcwP5dz/h0Plj6enJqjz1Zbq2l5WaqYnrVbwWOWMyF3F47g==",
-          "dev": true
-        }
+        "nanoid": "^3.3.4",
+        "picocolors": "^1.0.0",
+        "source-map-js": "^1.0.2"
       }
     },
     "postcss-flexbugs-fixes": {
@@ -15961,6 +16065,30 @@
       "dev": true,
       "requires": {
         "postcss": "^7.0.0"
+      },
+      "dependencies": {
+        "picocolors": {
+          "version": "0.2.1",
+          "resolved": "https://registry.npmjs.org/picocolors/-/picocolors-0.2.1.tgz",
+          "integrity": "sha512-cMlDqaLEqfSaW8Z7N5Jw+lyIW869EzT73/F5lhtY9cLGoVxSXznfgfXMO0Z5K0o0Q2TkTXq+0KFsdnSe3jDViA==",
+          "dev": true
+        },
+        "postcss": {
+          "version": "7.0.39",
+          "resolved": "https://registry.npmjs.org/postcss/-/postcss-7.0.39.tgz",
+          "integrity": "sha512-yioayjNbHn6z1/Bywyb2Y4s3yvDAeXGOyxqD+LnVOinq6Mdmd++SW2wUNVzavyyHxd6+DxzWGIuosg6P1Rj8uA==",
+          "dev": true,
+          "requires": {
+            "picocolors": "^0.2.1",
+            "source-map": "^0.6.1"
+          }
+        },
+        "source-map": {
+          "version": "0.6.1",
+          "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.6.1.tgz",
+          "integrity": "sha512-UjgapumWlbMhkBgzT7Ykc5YXUT46F0iKu8SGXq0bcwP5dz/h0Plj6enJqjz1Zbq2l5WaqYnrVbwWOWMyF3F47g==",
+          "dev": true
+        }
       }
     },
     "postcss-value-parser": {
@@ -16702,6 +16830,12 @@
       "integrity": "sha1-igOdLRAh0i0eoUyA2OpGi6LvP8w=",
       "dev": true
     },
+    "source-map-js": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/source-map-js/-/source-map-js-1.0.2.tgz",
+      "integrity": "sha512-R0XvVJ9WusLiqTCEiGCmICCMplcCkIwwR11mOSD9CR5u+IXYdiseeEuXCVAjS54zqwkLcPNnmU4OeJ6tUrWhDw==",
+      "dev": true
+    },
     "source-map-resolve": {
       "version": "0.5.3",
       "resolved": "https://registry.npmjs.org/source-map-resolve/-/source-map-resolve-0.5.3.tgz",
@@ -17109,15 +17243,6 @@
         "escape-string-regexp": "^1.0.2"
       }
     },
-    "supports-color": {
-      "version": "6.1.0",
-      "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-6.1.0.tgz",
-      "integrity": "sha512-qe1jfm1Mg7Nq/NSh6XE24gPXROEVsWHxC1LIx//XNlD9iw7YZQGjZNjYN7xGaEG6iKdA8EtNFW6R0gjnVXp+wQ==",
-      "dev": true,
-      "requires": {
-        "has-flag": "^3.0.0"
-      }
-    },
     "svgo": {
       "version": "1.3.2",
       "resolved": "https://registry.npmjs.org/svgo/-/svgo-1.3.2.tgz",
diff --git a/package.json b/package.json
index 8937ca70..4cb6aa79 100644
--- a/package.json
+++ b/package.json
@@ -39,7 +39,7 @@
     "imagemin-jpegtran": "^7.0.0",
     "imagemin-optipng": "^8.0.0",
     "imagemin-svgo": "^8.0.0",
-    "postcss": "^7.0.36",
+    "postcss": "^8.4.21",
     "postcss-flexbugs-fixes": "^4.1.0",
     "prettier": "^1.16.4",
     "sass": "^1.18.0",