diff --git a/env/userstyle/package.json b/env/userstyle/package.json
index 815e95db7c2..85470ed853f 100644
--- a/env/userstyle/package.json
+++ b/env/userstyle/package.json
@@ -30,7 +30,7 @@
     "eslint": "8.45.0",
     "postcss": "8.4.31",
     "postcss-cli": "10.1.0",
-    "postcss-scss": "4.0.6",
+    "postcss-scss": "4.0.9",
     "prettier": "3.0.0",
     "sass": "1.64.1",
     "stylelint": "15.10.2"
diff --git a/yarn.lock b/yarn.lock
index 063ad4dfb3c..c1cc34397e4 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -3925,7 +3925,7 @@ __metadata:
     eslint: "npm:8.45.0"
     postcss: "npm:8.4.31"
     postcss-cli: "npm:10.1.0"
-    postcss-scss: "npm:4.0.6"
+    postcss-scss: "npm:4.0.9"
     prettier: "npm:3.0.0"
     sass: "npm:1.64.1"
     stylelint: "npm:15.10.2"
@@ -12109,12 +12109,12 @@ __metadata:
   languageName: node
   linkType: hard
 
-"postcss-scss@npm:4.0.6":
-  version: 4.0.6
-  resolution: "postcss-scss@npm:4.0.6"
+"postcss-scss@npm:4.0.9":
+  version: 4.0.9
+  resolution: "postcss-scss@npm:4.0.9"
   peerDependencies:
-    postcss: ^8.4.19
-  checksum: 6cb8d50ac217c57421d4bb8f7506ae58a637663429f279ff86caca3cbedd9363c9cc324caf8a9d5c25f2f6b864307112c9d8018a180e43d094bccd6bd2da95e4
+    postcss: ^8.4.29
+  checksum: f917ecfd4b9113a6648e966a41f027ff7e14238393914978d44596e227a50f084667dc8818742348dc7d8b20130b30d4259aca1d4db86754a9c141202ae03714
   languageName: node
   linkType: hard