diff --git a/package-lock.json b/package-lock.json
index ea41ba2..a5678ed 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -16,7 +16,7 @@
         "markdown-it-anchor": "^9.2.0",
         "markdown-it-toc-done-right": "^4.2.0",
         "npm-run-all": "^4.1.5",
-        "sass": "^1.80.4"
+        "sass": "^1.81.0"
       }
     },
     "node_modules/@11ty/dependency-tree": {
@@ -328,6 +328,7 @@
       "resolved": "https://registry.npmjs.org/@parcel/watcher/-/watcher-2.4.1.tgz",
       "integrity": "sha512-HNjmfLQEVRZmHRET336f20H/8kOozUGwk7yajvsonjNxbj2wBTK1WsQuHkD5yYh9RxFGL2EyDHryOihOwUoKDA==",
       "dev": true,
+      "optional": true,
       "dependencies": {
         "detect-libc": "^1.0.3",
         "is-glob": "^4.0.3",
@@ -1164,6 +1165,7 @@
       "resolved": "https://registry.npmjs.org/detect-libc/-/detect-libc-1.0.3.tgz",
       "integrity": "sha512-pGjwhsmsp4kL2RTz08wcOlGN83otlqHeD/Z5T8GXZB+/YcpQ/dgo+lbU8ZsGxV0HIvqqxo9l7mqYwyYMD9bKDg==",
       "dev": true,
+      "optional": true,
       "bin": {
         "detect-libc": "bin/detect-libc.js"
       },
@@ -2013,9 +2015,9 @@
       }
     },
     "node_modules/immutable": {
-      "version": "4.3.4",
-      "resolved": "https://registry.npmjs.org/immutable/-/immutable-4.3.4.tgz",
-      "integrity": "sha512-fsXeu4J4i6WNWSikpI88v/PcVflZz+6kMhUfIwc5SY+poQRPnaf5V7qds6SUyUN3cVxEzuCab7QIoLOQ+DQ1wA==",
+      "version": "5.0.2",
+      "resolved": "https://registry.npmjs.org/immutable/-/immutable-5.0.2.tgz",
+      "integrity": "sha512-1NU7hWZDkV7hJ4PJ9dur9gTNQ4ePNPN4k9/0YhwjzykTi/+3Q5pF93YU5QoVj8BuOnhLgaY8gs0U2pj4kSYVcw==",
       "dev": true
     },
     "node_modules/inherits": {
@@ -2738,7 +2740,8 @@
       "version": "7.1.1",
       "resolved": "https://registry.npmjs.org/node-addon-api/-/node-addon-api-7.1.1.tgz",
       "integrity": "sha512-5m3bsyrjFWE1xf7nz7YXdN4udnVtXK6/Yfgn5qnahL6bCkf2yKt4k3nuTKAtT4r3IG8JNR2ncsIMdZuAzJjHQQ==",
-      "dev": true
+      "dev": true,
+      "optional": true
     },
     "node_modules/node-retrieve-globals": {
       "version": "6.0.0",
@@ -3446,14 +3449,13 @@
       }
     },
     "node_modules/sass": {
-      "version": "1.80.4",
-      "resolved": "https://registry.npmjs.org/sass/-/sass-1.80.4.tgz",
-      "integrity": "sha512-rhMQ2tSF5CsuuspvC94nPM9rToiAFw2h3JTrLlgmNw1MH79v8Cr3DH6KF6o6r+8oofY3iYVPUf66KzC8yuVN1w==",
+      "version": "1.81.0",
+      "resolved": "https://registry.npmjs.org/sass/-/sass-1.81.0.tgz",
+      "integrity": "sha512-Q4fOxRfhmv3sqCLoGfvrC9pRV8btc0UtqL9mN6Yrv6Qi9ScL55CVH1vlPP863ISLEEMNLLuu9P+enCeGHlnzhA==",
       "dev": true,
       "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": {
@@ -3461,6 +3463,9 @@
       },
       "engines": {
         "node": ">=14.0.0"
+      },
+      "optionalDependencies": {
+        "@parcel/watcher": "^2.4.1"
       }
     },
     "node_modules/sass/node_modules/chokidar": {
diff --git a/package.json b/package.json
index dfb6a10..ade09cf 100644
--- a/package.json
+++ b/package.json
@@ -14,7 +14,7 @@
     "markdown-it-anchor": "^9.2.0",
     "markdown-it-toc-done-right": "^4.2.0",
     "npm-run-all": "^4.1.5",
-    "sass": "^1.80.4"
+    "sass": "^1.81.0"
   },
   "scripts": {
     "serve": "npm-run-all -s clean build:11ty build:css -p watch:** --silent",