diff --git a/designer/package.json b/designer/package.json
index 7fe54fc0fd..cf1b46abca 100644
--- a/designer/package.json
+++ b/designer/package.json
@@ -138,7 +138,7 @@
     "resolve": "^1.22.0",
     "resolve-url-loader": "^5.0.0",
     "sass": "^1.26.11",
-    "sass-loader": "^10.0.2",
+    "sass-loader": "^14.2.1",
     "sinon": "^13.0.1",
     "standard": "16.0.4",
     "ts-node-dev": "^1.1.8",
diff --git a/yarn.lock b/yarn.lock
index 2a1445fbe3..57769e3137 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -5003,7 +5003,7 @@ __metadata:
     resolve: ^1.22.0
     resolve-url-loader: ^5.0.0
     sass: ^1.26.11
-    sass-loader: ^10.0.2
+    sass-loader: ^14.2.1
     schmervice: ^1.6.0
     sinon: ^13.0.1
     standard: 16.0.4
@@ -11431,14 +11431,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"govuk-frontend@npm:^4.0.1":
-  version: 4.7.0
-  resolution: "govuk-frontend@npm:4.7.0"
-  checksum: 0e246dd2c724e51fd14dd40fc31c66627df7d07ebe89e1a19b1e7da7e7a5eb86bc6560229e18a13e40651e6c953a67422d54e77e240d82efff7b2cbefaa8b88d
-  languageName: node
-  linkType: hard
-
-"govuk-frontend@npm:^4.8.0":
+"govuk-frontend@npm:^4.0.1, govuk-frontend@npm:^4.8.0":
   version: 4.8.0
   resolution: "govuk-frontend@npm:4.8.0"
   checksum: e255f924f399319e109347ec4993e0441fc5847a6a73ba44a465b1599c7d03e85c29212743b081ccd60e19224c6301143c77540b8e4bfe615fcb3e162b8663f4
@@ -18834,28 +18827,29 @@ __metadata:
   languageName: node
   linkType: hard
 
-"sass-loader@npm:^10.0.2":
-  version: 10.5.2
-  resolution: "sass-loader@npm:10.5.2"
+"sass-loader@npm:^14.2.1":
+  version: 14.2.1
+  resolution: "sass-loader@npm:14.2.1"
   dependencies:
-    klona: ^2.0.4
-    loader-utils: ^2.0.0
     neo-async: ^2.6.2
-    schema-utils: ^3.0.0
-    semver: ^7.3.2
   peerDependencies:
-    fibers: ">= 3.1.0"
+    "@rspack/core": 0.x || 1.x
     node-sass: ^4.0.0 || ^5.0.0 || ^6.0.0 || ^7.0.0 || ^8.0.0 || ^9.0.0
     sass: ^1.3.0
-    webpack: ^4.36.0 || ^5.0.0
+    sass-embedded: "*"
+    webpack: ^5.0.0
   peerDependenciesMeta:
-    fibers:
+    "@rspack/core":
       optional: true
     node-sass:
       optional: true
     sass:
       optional: true
-  checksum: 416909a9d685aafeb4342d91575439b293f4e1d6fdf7f8f970e4b3158af38e3e7379b87c0a82d7b7b32165b1f54bcd7eca3c132ad143405a5105ea4ba79cdac2
+    sass-embedded:
+      optional: true
+    webpack:
+      optional: true
+  checksum: f0c4710587d4cae56cad56eb46fe32c4a71c61a508951660dfb5a4cf873a3f221ec97658f364700fb4e3271376f7280656d4db9344754f7aab77d22bca70e22d
   languageName: node
   linkType: hard