diff --git a/package-lock.json b/package-lock.json
index a67a71660498..adb0b4b84334 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -67,7 +67,7 @@
         "amphtml-validator": "1.0.35",
         "ast-replace": "1.1.3",
         "atob": "2.1.2",
-        "autoprefixer": "10.3.7",
+        "autoprefixer": "10.4.0",
         "ava": "3.15.0",
         "babel-plugin-istanbul": "6.0.0",
         "babel-plugin-minify-replace": "0.5.0",
@@ -4973,15 +4973,16 @@
       }
     },
     "node_modules/autoprefixer": {
-      "version": "10.3.7",
+      "version": "10.4.0",
+      "resolved": "https://registry.npmjs.org/autoprefixer/-/autoprefixer-10.4.0.tgz",
+      "integrity": "sha512-7FdJ1ONtwzV1G43GDD0kpVMn/qbiNqyOPMFTX5nRffI+7vgWoFEc6DcXOxHJxrWNDXrZh18eDsZjvZGUljSRGA==",
       "dev": true,
-      "license": "MIT",
       "dependencies": {
-        "browserslist": "^4.17.3",
-        "caniuse-lite": "^1.0.30001264",
+        "browserslist": "^4.17.5",
+        "caniuse-lite": "^1.0.30001272",
         "fraction.js": "^4.1.1",
         "normalize-range": "^0.1.2",
-        "picocolors": "^0.2.1",
+        "picocolors": "^1.0.0",
         "postcss-value-parser": "^4.1.0"
       },
       "bin": {
@@ -5772,12 +5773,6 @@
         "url": "https://opencollective.com/browserslist"
       }
     },
-    "node_modules/browserslist/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
-    },
     "node_modules/bser": {
       "version": "2.1.1",
       "resolved": "https://registry.npmjs.org/bser/-/bser-2.1.1.tgz",
@@ -5959,9 +5954,9 @@
       }
     },
     "node_modules/caniuse-lite": {
-      "version": "1.0.30001271",
-      "resolved": "https://registry.npmjs.org/caniuse-lite/-/caniuse-lite-1.0.30001271.tgz",
-      "integrity": "sha512-BBruZFWmt3HFdVPS8kceTBIguKxu4f99n5JNp06OlPD/luoAMIaIK5ieV5YjnBLH3Nysai9sxj9rpJj4ZisXOA==",
+      "version": "1.0.30001272",
+      "resolved": "https://registry.npmjs.org/caniuse-lite/-/caniuse-lite-1.0.30001272.tgz",
+      "integrity": "sha512-DV1j9Oot5dydyH1v28g25KoVm7l8MTxazwuiH3utWiAS6iL/9Nh//TGwqFEeqqN8nnWYQ8HHhUq+o4QPt9kvYw==",
       "dev": true,
       "funding": {
         "type": "opencollective",
@@ -18649,9 +18644,10 @@
       "license": "MIT"
     },
     "node_modules/picocolors": {
-      "version": "0.2.1",
-      "dev": true,
-      "license": "ISC"
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/picocolors/-/picocolors-1.0.0.tgz",
+      "integrity": "sha512-1fygroTLlHu66zi26VoTDv8yRgm0Fccecssto+MhsZ0D/DGW2sm8E8AjW7NU5VVTRt5GxbeZ5qBuJr+HyLYkjQ==",
+      "dev": true
     },
     "node_modules/picomatch": {
       "version": "2.3.0",
@@ -19296,12 +19292,6 @@
         "node": "^10 || ^12 || ^13.7 || ^14 || >=15.0.1"
       }
     },
-    "node_modules/postcss/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
-    },
     "node_modules/posthtml": {
       "version": "0.16.5",
       "dev": true,
@@ -26702,14 +26692,16 @@
       }
     },
     "autoprefixer": {
-      "version": "10.3.7",
+      "version": "10.4.0",
+      "resolved": "https://registry.npmjs.org/autoprefixer/-/autoprefixer-10.4.0.tgz",
+      "integrity": "sha512-7FdJ1ONtwzV1G43GDD0kpVMn/qbiNqyOPMFTX5nRffI+7vgWoFEc6DcXOxHJxrWNDXrZh18eDsZjvZGUljSRGA==",
       "dev": true,
       "requires": {
-        "browserslist": "^4.17.3",
-        "caniuse-lite": "^1.0.30001264",
+        "browserslist": "^4.17.5",
+        "caniuse-lite": "^1.0.30001272",
         "fraction.js": "^4.1.1",
         "normalize-range": "^0.1.2",
-        "picocolors": "^0.2.1",
+        "picocolors": "^1.0.0",
         "postcss-value-parser": "^4.1.0"
       }
     },
@@ -27244,14 +27236,6 @@
         "escalade": "^3.1.1",
         "node-releases": "^2.0.1",
         "picocolors": "^1.0.0"
-      },
-      "dependencies": {
-        "picocolors": {
-          "version": "1.0.0",
-          "resolved": "https://registry.npmjs.org/picocolors/-/picocolors-1.0.0.tgz",
-          "integrity": "sha512-1fygroTLlHu66zi26VoTDv8yRgm0Fccecssto+MhsZ0D/DGW2sm8E8AjW7NU5VVTRt5GxbeZ5qBuJr+HyLYkjQ==",
-          "dev": true
-        }
       }
     },
     "bser": {
@@ -27386,9 +27370,9 @@
       }
     },
     "caniuse-lite": {
-      "version": "1.0.30001271",
-      "resolved": "https://registry.npmjs.org/caniuse-lite/-/caniuse-lite-1.0.30001271.tgz",
-      "integrity": "sha512-BBruZFWmt3HFdVPS8kceTBIguKxu4f99n5JNp06OlPD/luoAMIaIK5ieV5YjnBLH3Nysai9sxj9rpJj4ZisXOA==",
+      "version": "1.0.30001272",
+      "resolved": "https://registry.npmjs.org/caniuse-lite/-/caniuse-lite-1.0.30001272.tgz",
+      "integrity": "sha512-DV1j9Oot5dydyH1v28g25KoVm7l8MTxazwuiH3utWiAS6iL/9Nh//TGwqFEeqqN8nnWYQ8HHhUq+o4QPt9kvYw==",
       "dev": true
     },
     "caseless": {
@@ -36234,7 +36218,9 @@
       "version": "2.1.0"
     },
     "picocolors": {
-      "version": "0.2.1",
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/picocolors/-/picocolors-1.0.0.tgz",
+      "integrity": "sha512-1fygroTLlHu66zi26VoTDv8yRgm0Fccecssto+MhsZ0D/DGW2sm8E8AjW7NU5VVTRt5GxbeZ5qBuJr+HyLYkjQ==",
       "dev": true
     },
     "picomatch": {
@@ -36370,12 +36356,6 @@
           "resolved": "https://registry.npmjs.org/nanoid/-/nanoid-3.1.30.tgz",
           "integrity": "sha512-zJpuPDwOv8D2zq2WRoMe1HsfZthVewpel9CAvTfc/2mBD1uUT/agc5f7GHGWXlYkFvi1mVxe4IjvP2HNrop7nQ==",
           "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
         }
       }
     },
diff --git a/package.json b/package.json
index 27033a256922..4770d415bf36 100644
--- a/package.json
+++ b/package.json
@@ -72,7 +72,7 @@
     "amphtml-validator": "1.0.35",
     "ast-replace": "1.1.3",
     "atob": "2.1.2",
-    "autoprefixer": "10.3.7",
+    "autoprefixer": "10.4.0",
     "ava": "3.15.0",
     "babel-plugin-istanbul": "6.0.0",
     "babel-plugin-minify-replace": "0.5.0",