diff --git a/package.json b/package.json
index 431eb2c2..1cb2ed6b 100644
--- a/package.json
+++ b/package.json
@@ -4,7 +4,7 @@
   "dependencies": {
     "esbuild": "^0.21.4",
     "govuk-frontend": "^5.3.0",
-    "sass": "^1.75.0"
+    "sass": "^1.77.5"
   },
   "scripts": {
     "build:css": "sass ./app/assets/stylesheets/main.scss:./app/assets/builds/main.css --no-source-map --load-path=node_modules --quiet-deps",
diff --git a/yarn.lock b/yarn.lock
index fbace1e5..b5d15f61 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -261,10 +261,10 @@ readdirp@~3.6.0:
   dependencies:
     picomatch "^2.2.1"
 
-sass@^1.75.0:
-  version "1.75.0"
-  resolved "https://registry.yarnpkg.com/sass/-/sass-1.75.0.tgz#91bbe87fb02dfcc34e052ddd6ab80f60d392be6c"
-  integrity sha512-ShMYi3WkrDWxExyxSZPst4/okE9ts46xZmJDSawJQrnte7M1V9fScVB+uNXOVKRBt0PggHOwoZcn8mYX4trnBw==
+sass@^1.77.5:
+  version "1.77.5"
+  resolved "https://registry.yarnpkg.com/sass/-/sass-1.77.5.tgz#5f9009820297521356e962c0bed13ee36710edfe"
+  integrity sha512-oDfX1mukIlxacPdQqNb6mV2tVCrnE+P3nVYioy72V5tlk56CPNcO4TCuFcaCRKKfJ1M3lH95CleRS+dVKL2qMg==
   dependencies:
     chokidar ">=3.0.0 <4.0.0"
     immutable "^4.0.0"