diff --git a/metaflow/plugins/cards/ui/package-lock.json b/metaflow/plugins/cards/ui/package-lock.json
index e32b6fa3f34..22d6926e9cc 100644
--- a/metaflow/plugins/cards/ui/package-lock.json
+++ b/metaflow/plugins/cards/ui/package-lock.json
@@ -27,7 +27,7 @@
         "eslint": "^8.55.0",
         "eslint-plugin-prettier": "^5.0.1",
         "eslint-plugin-svelte": "^2.35.1",
-        "postcss": "^8.4.32",
+        "postcss": "^8.5.12",
         "prettier": "^3.1.1",
         "svelte": "^4.2.19",
         "svelte-check": "^3.6.2",
@@ -4707,9 +4707,9 @@
       }
     },
     "node_modules/postcss": {
-      "version": "8.5.6",
-      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.5.6.tgz",
-      "integrity": "sha512-3Ybi1tAuwAP9s0r1UQ2J4n5Y0G05bJkpUIO0/bI9MhwmD70S5aTWbXGBwxHrelT+XM1k6dM0pk+SwNkpTRN7Pg==",
+      "version": "8.5.12",
+      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.5.12.tgz",
+      "integrity": "sha512-W62t/Se6rA0Az3DfCL0AqJwXuKwBeYg6nOaIgzP+xZ7N5BFCI7DYi1qs6ygUYT6rvfi6t9k65UMLJC+PHZpDAA==",
       "dev": true,
       "funding": [
         {
diff --git a/metaflow/plugins/cards/ui/package.json b/metaflow/plugins/cards/ui/package.json
index 2ed58e33a61..094ca3b3461 100644
--- a/metaflow/plugins/cards/ui/package.json
+++ b/metaflow/plugins/cards/ui/package.json
@@ -26,7 +26,7 @@
     "eslint": "^8.55.0",
     "eslint-plugin-prettier": "^5.0.1",
     "eslint-plugin-svelte": "^2.35.1",
-    "postcss": "^8.4.32",
+    "postcss": "^8.5.12",
     "prettier": "^3.1.1",
     "svelte": "^4.2.19",
     "svelte-check": "^3.6.2",