diff --git a/html/package.json b/html/package.json
index d33b93c0..91e90b32 100644
--- a/html/package.json
+++ b/html/package.json
@@ -37,7 +37,7 @@
     "gulp-rename": "^2.0.0",
     "html-webpack-plugin": "^5.6.0",
     "mini-css-extract-plugin": "^2.8.1",
-    "sass": "^1.71.1",
+    "sass": "^1.77.4",
     "sass-loader": "^14.1.1",
     "scssfmt": "^1.0.7",
     "style-loader": "^3.3.4",
diff --git a/html/yarn.lock b/html/yarn.lock
index 951cd40c..a04829bf 100644
--- a/html/yarn.lock
+++ b/html/yarn.lock
@@ -9207,16 +9207,16 @@ __metadata:
   languageName: node
   linkType: hard
 
-"sass@npm:^1.71.1":
-  version: 1.71.1
-  resolution: "sass@npm:1.71.1"
+"sass@npm:^1.77.4":
+  version: 1.77.4
+  resolution: "sass@npm:1.77.4"
   dependencies:
     chokidar: ">=3.0.0 <4.0.0"
     immutable: ^4.0.0
     source-map-js: ">=0.6.2 <2.0.0"
   bin:
     sass: sass.js
-  checksum: 19c4939d3042eb9459d462bbd27b1f576fa18034e23c87ca0005b87effdee431c16503b5a785edcdcde1a76dfb804716d9ad42c85a78968ac3825d515e45cb53
+  checksum: 415d76960e35d78310ffc33bc61fdb2b35a54bb2823dfc4eff50eee960096dacc210d7ef7ae6695120e1a4f005f269719c34d58c77c54ff7787516bda6a89e55
   languageName: node
   linkType: hard
 
@@ -10499,7 +10499,7 @@ __metadata:
     html-webpack-plugin: ^5.6.0
     mini-css-extract-plugin: ^2.8.1
     preact: ^10.19.6
-    sass: ^1.71.1
+    sass: ^1.77.4
     sass-loader: ^14.1.1
     scssfmt: ^1.0.7
     style-loader: ^3.3.4