diff --git a/package.json b/package.json
index 73cec90a..ba9a30ea 100644
--- a/package.json
+++ b/package.json
@@ -5,7 +5,7 @@
     "dfe-autocomplete": "github:DFE-Digital/dfe-autocomplete",
     "esbuild": "^0.18.17",
     "govuk-frontend": "^4.6.0",
-    "sass": "^1.64.2"
+    "sass": "^1.66.0"
   },
   "scripts": {
     "build": "esbuild app/javascript/*.* --target=ie11 --bundle --sourcemap --outdir=app/assets/builds",
diff --git a/yarn.lock b/yarn.lock
index 0d909fba..fc94b1e4 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1546,10 +1546,10 @@ safe-regex-test@^1.0.0:
     get-intrinsic "^1.1.3"
     is-regex "^1.1.4"
 
-sass@^1.64.2:
-  version "1.64.2"
-  resolved "https://registry.yarnpkg.com/sass/-/sass-1.64.2.tgz#0d9805ad6acf31c59c3acc725fcfb91b7fcc6909"
-  integrity sha512-TnDlfc+CRnUAgLO9D8cQLFu/GIjJIzJCGkE7o4ekIGQOH7T3GetiRR/PsTWJUHhkzcSPrARkPI+gNWn5alCzDg==
+sass@^1.66.0:
+  version "1.66.0"
+  resolved "https://registry.yarnpkg.com/sass/-/sass-1.66.0.tgz#74728eed49b0e490cd729c233e7f1c6ce356e638"
+  integrity sha512-C3U+RgpAAlTXULZkWwzfysgbbBBo8IZudNAOJAVBLslFbIaZv4MBPkTqhuvpK4lqgdoFiWhnOGMoV4L1FyOBag==
   dependencies:
     chokidar ">=3.0.0 <4.0.0"
     immutable "^4.0.0"