diff --git a/package.json b/package.json
index 09abb18d..8a3d5367 100644
--- a/package.json
+++ b/package.json
@@ -6,7 +6,7 @@
     "dfe-autocomplete": "github:DFE-Digital/dfe-autocomplete#main",
     "esbuild": "^0.20.1",
     "govuk-frontend": "^5.2.0",
-    "sass": "^1.71.1"
+    "sass": "^1.77.3"
   },
   "scripts": {
     "build": "esbuild app/javascript/*.* --bundle --sourcemap --outdir=app/assets/builds --public-path=assets",
diff --git a/yarn.lock b/yarn.lock
index c8cf2c5e..f312ffeb 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1429,10 +1429,10 @@ safe-regex-test@^1.0.0:
     get-intrinsic "^1.2.2"
     is-regex "^1.1.4"
 
-sass@^1.71.1:
-  version "1.71.1"
-  resolved "https://registry.yarnpkg.com/sass/-/sass-1.71.1.tgz#dfb09c63ce63f89353777bbd4a88c0a38386ee54"
-  integrity sha512-wovtnV2PxzteLlfNzbgm1tFXPLoZILYAMJtvoXXkD7/+1uP41eKkIt1ypWq5/q2uT94qHjXehEYfmjKOvjL9sg==
+sass@^1.77.3:
+  version "1.77.3"
+  resolved "https://registry.yarnpkg.com/sass/-/sass-1.77.3.tgz#4e93f6197786c05cab2c795c3f0f243470d94836"
+  integrity sha512-WJHo+jmFp0dwRuymPmIovuxHaBntcCyja5hCB0yYY9wWrViEp4kF5Cdai98P72v6FzroPuABqu+ddLMbQWmwzA==
   dependencies:
     chokidar ">=3.0.0 <4.0.0"
     immutable "^4.0.0"