diff --git a/package.json b/package.json
index ebb4f82d..012720b8 100644
--- a/package.json
+++ b/package.json
@@ -64,7 +64,7 @@
     "eslint-plugin-react-refresh": "0.4.20",
     "jsdom": "26.1.0",
     "lerna": "8.2.2",
-    "postcss": "8.5.4",
+    "postcss": "8.5.5",
     "prettier": "3.5.3",
     "react": "^18.0.0",
     "react-dom": "^18.0.0",
diff --git a/packages/website/package.json b/packages/website/package.json
index 6be8e7ca..8e3e6adb 100644
--- a/packages/website/package.json
+++ b/packages/website/package.json
@@ -22,7 +22,7 @@
     "@docusaurus/preset-classic": "3.8.1",
     "@mdx-js/react": "^3.1.0",
     "file-loader": "6.2.0",
-    "postcss": "8.5.4",
+    "postcss": "8.5.5",
     "postcss-import": "16.1.0",
     "postcss-preset-env": "10.2.1",
     "prism-react-renderer": "2.4.1",
diff --git a/yarn.lock b/yarn.lock
index 9657f28b..fc4f10ae 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2362,7 +2362,7 @@ __metadata:
     eslint-plugin-react-refresh: "npm:0.4.20"
     jsdom: "npm:26.1.0"
     lerna: "npm:8.2.2"
-    postcss: "npm:8.5.4"
+    postcss: "npm:8.5.5"
     prettier: "npm:3.5.3"
     react: "npm:^18.0.0"
     react-dom: "npm:^18.0.0"
@@ -2462,7 +2462,7 @@ __metadata:
     "@docusaurus/preset-classic": "npm:3.8.1"
     "@mdx-js/react": "npm:^3.1.0"
     file-loader: "npm:6.2.0"
-    postcss: "npm:8.5.4"
+    postcss: "npm:8.5.5"
     postcss-import: "npm:16.1.0"
     postcss-preset-env: "npm:10.2.1"
     prism-react-renderer: "npm:2.4.1"
@@ -19569,14 +19569,14 @@ __metadata:
   languageName: node
   linkType: hard
 
-"postcss@npm:8.5.4, postcss@npm:^8.5.4":
-  version: 8.5.4
-  resolution: "postcss@npm:8.5.4"
+"postcss@npm:8.5.5":
+  version: 8.5.5
+  resolution: "postcss@npm:8.5.5"
   dependencies:
     nanoid: "npm:^3.3.11"
     picocolors: "npm:^1.1.1"
     source-map-js: "npm:^1.2.1"
-  checksum: 10c0/0feff648614a834f7cd5396ea6b05b658ca0507e10a4eaad03b56c348f6aec93f42a885fc1b30522630c6a7e49ae53b38a061e3cba526f2d9857afbe095a22bb
+  checksum: 10c0/6415873fab84de05c2d8fd18f72ea6654bca437bb4b9f02ca819c438501e4b3a450023e575e17587c6eaa5bedddaaa4dad3af210f5cf166e30cec09cac58baf8
   languageName: node
   linkType: hard
 
@@ -19602,6 +19602,17 @@ __metadata:
   languageName: node
   linkType: hard
 
+"postcss@npm:^8.5.4":
+  version: 8.5.4
+  resolution: "postcss@npm:8.5.4"
+  dependencies:
+    nanoid: "npm:^3.3.11"
+    picocolors: "npm:^1.1.1"
+    source-map-js: "npm:^1.2.1"
+  checksum: 10c0/0feff648614a834f7cd5396ea6b05b658ca0507e10a4eaad03b56c348f6aec93f42a885fc1b30522630c6a7e49ae53b38a061e3cba526f2d9857afbe095a22bb
+  languageName: node
+  linkType: hard
+
 "preact@npm:^10.0.0":
   version: 10.25.4
   resolution: "preact@npm:10.25.4"