diff --git a/package-lock.json b/package-lock.json
index ed7af7f3..c04beb83 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -30,7 +30,7 @@
         "nhsuk-frontend": "^9.1.0",
         "nunjucks": "^3.2.4",
         "path": "^0.12.7",
-        "sass": "^1.79.5"
+        "sass": "^1.83.1"
       },
       "devDependencies": {
         "eslint": "^8.56.0",
@@ -2579,6 +2579,7 @@
       "version": "2.4.1",
       "resolved": "https://registry.npmjs.org/@parcel/watcher/-/watcher-2.4.1.tgz",
       "integrity": "sha512-HNjmfLQEVRZmHRET336f20H/8kOozUGwk7yajvsonjNxbj2wBTK1WsQuHkD5yYh9RxFGL2EyDHryOihOwUoKDA==",
+      "optional": true,
       "dependencies": {
         "detect-libc": "^1.0.3",
         "is-glob": "^4.0.3",
@@ -5068,6 +5069,7 @@
       "version": "1.0.3",
       "resolved": "https://registry.npmjs.org/detect-libc/-/detect-libc-1.0.3.tgz",
       "integrity": "sha512-pGjwhsmsp4kL2RTz08wcOlGN83otlqHeD/Z5T8GXZB+/YcpQ/dgo+lbU8ZsGxV0HIvqqxo9l7mqYwyYMD9bKDg==",
+      "optional": true,
       "bin": {
         "detect-libc": "bin/detect-libc.js"
       },
@@ -11466,7 +11468,8 @@
     "node_modules/node-addon-api": {
       "version": "7.1.1",
       "resolved": "https://registry.npmjs.org/node-addon-api/-/node-addon-api-7.1.1.tgz",
-      "integrity": "sha512-5m3bsyrjFWE1xf7nz7YXdN4udnVtXK6/Yfgn5qnahL6bCkf2yKt4k3nuTKAtT4r3IG8JNR2ncsIMdZuAzJjHQQ=="
+      "integrity": "sha512-5m3bsyrjFWE1xf7nz7YXdN4udnVtXK6/Yfgn5qnahL6bCkf2yKt4k3nuTKAtT4r3IG8JNR2ncsIMdZuAzJjHQQ==",
+      "optional": true
     },
     "node_modules/node-int64": {
       "version": "0.4.0",
@@ -12904,13 +12907,12 @@
       "integrity": "sha512-YZo3K82SD7Riyi0E1EQPojLz7kpepnSQI9IyPbHHg1XXXevb5dJI7tpyN2ADxGcQbHG7vcyRHk0cbwqcQriUtg=="
     },
     "node_modules/sass": {
-      "version": "1.79.5",
-      "resolved": "https://registry.npmjs.org/sass/-/sass-1.79.5.tgz",
-      "integrity": "sha512-W1h5kp6bdhqFh2tk3DsI771MoEJjvrSY/2ihJRJS4pjIyfJCw0nTsxqhnrUzaLMOJjFchj8rOvraI/YUVjtx5g==",
+      "version": "1.83.1",
+      "resolved": "https://registry.npmjs.org/sass/-/sass-1.83.1.tgz",
+      "integrity": "sha512-EVJbDaEs4Rr3F0glJzFSOvtg2/oy2V/YrGFPqPY24UqcLDWcI9ZY5sN+qyO3c/QCZwzgfirvhXvINiJCE/OLcA==",
       "dependencies": {
-        "@parcel/watcher": "^2.4.1",
         "chokidar": "^4.0.0",
-        "immutable": "^4.0.0",
+        "immutable": "^5.0.2",
         "source-map-js": ">=0.6.2 <2.0.0"
       },
       "bin": {
@@ -12918,6 +12920,9 @@
       },
       "engines": {
         "node": ">=14.0.0"
+      },
+      "optionalDependencies": {
+        "@parcel/watcher": "^2.4.1"
       }
     },
     "node_modules/sass/node_modules/chokidar": {
@@ -12935,9 +12940,9 @@
       }
     },
     "node_modules/sass/node_modules/immutable": {
-      "version": "4.1.0",
-      "resolved": "https://registry.npmjs.org/immutable/-/immutable-4.1.0.tgz",
-      "integrity": "sha512-oNkuqVTA8jqG1Q6c+UglTOD1xhC1BtjKI7XkCXRkZHrN5m18/XsnUp8Q89GkQO/z+0WjonSvl0FLhDYftp46nQ=="
+      "version": "5.0.3",
+      "resolved": "https://registry.npmjs.org/immutable/-/immutable-5.0.3.tgz",
+      "integrity": "sha512-P8IdPQHq3lA1xVeBRi5VPqUm5HDgKnx0Ru51wZz5mjxHr5n3RWhjIpOFU7ybkUxfB+5IToy+OLaHYDBIWsv+uw=="
     },
     "node_modules/sass/node_modules/readdirp": {
       "version": "4.0.2",
@@ -16712,6 +16717,7 @@
       "version": "2.4.1",
       "resolved": "https://registry.npmjs.org/@parcel/watcher/-/watcher-2.4.1.tgz",
       "integrity": "sha512-HNjmfLQEVRZmHRET336f20H/8kOozUGwk7yajvsonjNxbj2wBTK1WsQuHkD5yYh9RxFGL2EyDHryOihOwUoKDA==",
+      "optional": true,
       "requires": {
         "@parcel/watcher-android-arm64": "2.4.1",
         "@parcel/watcher-darwin-arm64": "2.4.1",
@@ -18459,7 +18465,8 @@
     "detect-libc": {
       "version": "1.0.3",
       "resolved": "https://registry.npmjs.org/detect-libc/-/detect-libc-1.0.3.tgz",
-      "integrity": "sha512-pGjwhsmsp4kL2RTz08wcOlGN83otlqHeD/Z5T8GXZB+/YcpQ/dgo+lbU8ZsGxV0HIvqqxo9l7mqYwyYMD9bKDg=="
+      "integrity": "sha512-pGjwhsmsp4kL2RTz08wcOlGN83otlqHeD/Z5T8GXZB+/YcpQ/dgo+lbU8ZsGxV0HIvqqxo9l7mqYwyYMD9bKDg==",
+      "optional": true
     },
     "detect-newline": {
       "version": "3.1.0",
@@ -23279,7 +23286,8 @@
     "node-addon-api": {
       "version": "7.1.1",
       "resolved": "https://registry.npmjs.org/node-addon-api/-/node-addon-api-7.1.1.tgz",
-      "integrity": "sha512-5m3bsyrjFWE1xf7nz7YXdN4udnVtXK6/Yfgn5qnahL6bCkf2yKt4k3nuTKAtT4r3IG8JNR2ncsIMdZuAzJjHQQ=="
+      "integrity": "sha512-5m3bsyrjFWE1xf7nz7YXdN4udnVtXK6/Yfgn5qnahL6bCkf2yKt4k3nuTKAtT4r3IG8JNR2ncsIMdZuAzJjHQQ==",
+      "optional": true
     },
     "node-int64": {
       "version": "0.4.0",
@@ -24335,13 +24343,13 @@
       "integrity": "sha512-YZo3K82SD7Riyi0E1EQPojLz7kpepnSQI9IyPbHHg1XXXevb5dJI7tpyN2ADxGcQbHG7vcyRHk0cbwqcQriUtg=="
     },
     "sass": {
-      "version": "1.79.5",
-      "resolved": "https://registry.npmjs.org/sass/-/sass-1.79.5.tgz",
-      "integrity": "sha512-W1h5kp6bdhqFh2tk3DsI771MoEJjvrSY/2ihJRJS4pjIyfJCw0nTsxqhnrUzaLMOJjFchj8rOvraI/YUVjtx5g==",
+      "version": "1.83.1",
+      "resolved": "https://registry.npmjs.org/sass/-/sass-1.83.1.tgz",
+      "integrity": "sha512-EVJbDaEs4Rr3F0glJzFSOvtg2/oy2V/YrGFPqPY24UqcLDWcI9ZY5sN+qyO3c/QCZwzgfirvhXvINiJCE/OLcA==",
       "requires": {
         "@parcel/watcher": "^2.4.1",
         "chokidar": "^4.0.0",
-        "immutable": "^4.0.0",
+        "immutable": "^5.0.2",
         "source-map-js": ">=0.6.2 <2.0.0"
       },
       "dependencies": {
@@ -24354,9 +24362,9 @@
           }
         },
         "immutable": {
-          "version": "4.1.0",
-          "resolved": "https://registry.npmjs.org/immutable/-/immutable-4.1.0.tgz",
-          "integrity": "sha512-oNkuqVTA8jqG1Q6c+UglTOD1xhC1BtjKI7XkCXRkZHrN5m18/XsnUp8Q89GkQO/z+0WjonSvl0FLhDYftp46nQ=="
+          "version": "5.0.3",
+          "resolved": "https://registry.npmjs.org/immutable/-/immutable-5.0.3.tgz",
+          "integrity": "sha512-P8IdPQHq3lA1xVeBRi5VPqUm5HDgKnx0Ru51wZz5mjxHr5n3RWhjIpOFU7ybkUxfB+5IToy+OLaHYDBIWsv+uw=="
         },
         "readdirp": {
           "version": "4.0.2",
diff --git a/package.json b/package.json
index 429cf512..659bc2c9 100644
--- a/package.json
+++ b/package.json
@@ -36,7 +36,7 @@
     "nhsuk-frontend": "^9.1.0",
     "nunjucks": "^3.2.4",
     "path": "^0.12.7",
-    "sass": "^1.79.5"
+    "sass": "^1.83.1"
   },
   "devDependencies": {
     "eslint": "^8.56.0",