diff --git a/apps/block_scout_web/assets/package-lock.json b/apps/block_scout_web/assets/package-lock.json
index acae87ba3198..9f9b73bdbc72 100644
--- a/apps/block_scout_web/assets/package-lock.json
+++ b/apps/block_scout_web/assets/package-lock.json
@@ -82,7 +82,7 @@
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@@ -14285,9 +14285,9 @@
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+      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.4.21.tgz",
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@@ -29608,9 +29608,9 @@
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-      "version": "8.4.16",
-      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.4.16.tgz",
-      "integrity": "sha512-ipHE1XBvKzm5xI7hiHCZJCSugxvsdq2mPnsq5+UF+VHCjiBvtDrlxJfMBToWaP9D5XlgNmcFGqoHmUn0EYEaRQ==",
+      "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==",
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diff --git a/apps/block_scout_web/assets/package.json b/apps/block_scout_web/assets/package.json
index e3e78083bd97..6440e80c6b75 100644
--- a/apps/block_scout_web/assets/package.json
+++ b/apps/block_scout_web/assets/package.json
@@ -94,7 +94,7 @@
     "jest": "^29.0.1",
     "jest-environment-jsdom": "^29.0.1",
     "mini-css-extract-plugin": "^2.6.1",
-    "postcss": "^8.4.16",
+    "postcss": "^8.4.21",
     "postcss-loader": "^7.0.1",
     "sass": "^1.54.8",
     "sass-loader": "^13.0.2",