diff --git a/package-lock.json b/package-lock.json
index 6f5944fdd41..0566d82f389 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -83,7 +83,7 @@
         "lerna": "8.1.6",
         "lint-staged": "15.2.7",
         "markdownlint-cli": "0.41.0",
-        "postcss": "8.4.38",
+        "postcss": "8.4.39",
         "prettier": "3.3.2",
         "puppeteer": "21.5.0",
         "quicktype-core": "23.0.170",
@@ -23805,7 +23805,9 @@
       }
     },
     "node_modules/postcss": {
-      "version": "8.4.38",
+      "version": "8.4.39",
+      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.4.39.tgz",
+      "integrity": "sha512-0vzE+lAiG7hZl1/9I8yzKLx3aR9Xbof3fBHKunvMfOCYAtMhrsnccJY2iTURb9EZd5+pLuiNV9/c/GZJOHsgIw==",
       "dev": true,
       "funding": [
         {
@@ -23821,10 +23823,9 @@
           "url": "https://github.com/sponsors/ai"
         }
       ],
-      "license": "MIT",
       "dependencies": {
         "nanoid": "^3.3.7",
-        "picocolors": "^1.0.0",
+        "picocolors": "^1.0.1",
         "source-map-js": "^1.2.0"
       },
       "engines": {
@@ -32806,6 +32807,34 @@
         "url": "https://github.com/sponsors/jonschlinkert"
       }
     },
+    "packages/calcite-components-angular/node_modules/postcss": {
+      "version": "8.4.38",
+      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.4.38.tgz",
+      "integrity": "sha512-Wglpdk03BSfXkHoQa3b/oulrotAkwrlLDRSOb9D0bN86FdRyE9lppSp33aHNPgBa0JKCoB+drFLZkQoRRYae5A==",
+      "dev": true,
+      "funding": [
+        {
+          "type": "opencollective",
+          "url": "https://opencollective.com/postcss/"
+        },
+        {
+          "type": "tidelift",
+          "url": "https://tidelift.com/funding/github/npm/postcss"
+        },
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/ai"
+        }
+      ],
+      "dependencies": {
+        "nanoid": "^3.3.7",
+        "picocolors": "^1.0.0",
+        "source-map-js": "^1.2.0"
+      },
+      "engines": {
+        "node": "^10 || ^12 || >=14"
+      }
+    },
     "packages/calcite-components-angular/node_modules/sass": {
       "version": "1.77.2",
       "resolved": "https://registry.npmjs.org/sass/-/sass-1.77.2.tgz",
diff --git a/package.json b/package.json
index 7fed5362b27..f05db16a951 100644
--- a/package.json
+++ b/package.json
@@ -98,7 +98,7 @@
     "lerna": "8.1.6",
     "lint-staged": "15.2.7",
     "markdownlint-cli": "0.41.0",
-    "postcss": "8.4.38",
+    "postcss": "8.4.39",
     "prettier": "3.3.2",
     "puppeteer": "21.5.0",
     "quicktype-core": "23.0.170",