diff --git a/client/package.json b/client/package.json
index 21084c0b922..b96a938a557 100644
--- a/client/package.json
+++ b/client/package.json
@@ -88,7 +88,7 @@
     "nanoid": "3.3.4",
     "normalize-url": "4.5.1",
     "path-browserify": "1.0.1",
-    "postcss": "8.4.20",
+    "postcss": "8.4.21",
     "prismjs": "1.29.0",
     "process": "0.11.10",
     "prop-types": "15.8.1",
diff --git a/package-lock.json b/package-lock.json
index ea33ae78dec..526c8775ae9 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -478,7 +478,7 @@
         "nanoid": "3.3.4",
         "normalize-url": "4.5.1",
         "path-browserify": "1.0.1",
-        "postcss": "8.4.20",
+        "postcss": "8.4.21",
         "prismjs": "1.29.0",
         "process": "0.11.10",
         "prop-types": "15.8.1",
@@ -40919,9 +40919,9 @@
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-      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.4.20.tgz",
-      "integrity": "sha512-6Q04AXR1212bXr5fh03u8aAwbLxAQNGQ/Q1LNa0VfOI06ZAlhPHtQvE4OIdpj4kLThXilalPnmDSOD65DcHt+g==",
+      "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==",
       "funding": [
         {
           "type": "opencollective",
@@ -54500,7 +54500,7 @@
         "babel-loader": "8.3.0",
         "babel-plugin-transform-react-remove-prop-types": "0.4.24",
         "cross-env": "7.0.3",
-        "postcss": "8.4.20",
+        "postcss": "8.4.21",
         "postcss-import": "14.1.0",
         "rimraf": "3.0.2",
         "rollup": "2.79.1",
@@ -56479,7 +56479,7 @@
         "nanoid": "3.3.4",
         "normalize-url": "4.5.1",
         "path-browserify": "1.0.1",
-        "postcss": "8.4.20",
+        "postcss": "8.4.21",
         "prismjs": "1.29.0",
         "process": "0.11.10",
         "prop-types": "15.8.1",
@@ -56794,7 +56794,7 @@
         "babel-loader": "8.3.0",
         "babel-plugin-transform-react-remove-prop-types": "0.4.24",
         "cross-env": "7.0.3",
-        "postcss": "8.4.20",
+        "postcss": "8.4.21",
         "postcss-import": "14.1.0",
         "react": "16.14.0",
         "react-dom": "16.14.0",
@@ -82399,9 +82399,9 @@
       "version": "0.1.1"
     },
     "postcss": {
-      "version": "8.4.20",
-      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.4.20.tgz",
-      "integrity": "sha512-6Q04AXR1212bXr5fh03u8aAwbLxAQNGQ/Q1LNa0VfOI06ZAlhPHtQvE4OIdpj4kLThXilalPnmDSOD65DcHt+g==",
+      "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==",
       "requires": {
         "nanoid": "^3.3.4",
         "picocolors": "^1.0.0",
diff --git a/tools/ui-components/package.json b/tools/ui-components/package.json
index c7f9dab8d34..cf2599efaae 100644
--- a/tools/ui-components/package.json
+++ b/tools/ui-components/package.json
@@ -47,7 +47,7 @@
     "babel-loader": "8.3.0",
     "babel-plugin-transform-react-remove-prop-types": "0.4.24",
     "cross-env": "7.0.3",
-    "postcss": "8.4.20",
+    "postcss": "8.4.21",
     "postcss-import": "14.1.0",
     "rimraf": "3.0.2",
     "rollup": "2.79.1",