diff --git a/html/package.json b/html/package.json
index 3400c9b..cb7cbfa 100644
--- a/html/package.json
+++ b/html/package.json
@@ -29,7 +29,7 @@
     "gulp-rename": "^2.0.0",
     "html-webpack-plugin": "^5.3.1",
     "mini-css-extract-plugin": "^1.6.0",
-    "node-sass": "^5.0.0",
+    "node-sass": "^6.0.0",
     "sass-loader": "^11.0.1",
     "scssfmt": "^1.0.7",
     "style-loader": "^2.0.0",
diff --git a/html/yarn.lock b/html/yarn.lock
index ef1d2f6..f7ff72c 100644
--- a/html/yarn.lock
+++ b/html/yarn.lock
@@ -4638,10 +4638,10 @@ node-releases@^1.1.71:
   resolved "https://registry.yarnpkg.com/node-releases/-/node-releases-1.1.71.tgz#cb1334b179896b1c89ecfdd4b725fb7bbdfc7dbb"
   integrity sha512-zR6HoT6LrLCRBwukmrVbHv0EpEQjksO6GmFcZQQuCAy139BEsoVKPYnf3jongYW83fAa1torLGYwxxky/p28sg==
 
-node-sass@^5.0.0:
-  version "5.0.0"
-  resolved "https://registry.yarnpkg.com/node-sass/-/node-sass-5.0.0.tgz#4e8f39fbef3bac8d2dc72ebe3b539711883a78d2"
-  integrity sha512-opNgmlu83ZCF792U281Ry7tak9IbVC+AKnXGovcQ8LG8wFaJv6cLnRlc6DIHlmNxWEexB5bZxi9SZ9JyUuOYjw==
+node-sass@^6.0.0:
+  version "6.0.0"
+  resolved "https://registry.yarnpkg.com/node-sass/-/node-sass-6.0.0.tgz#f30da3e858ad47bfd138bc0e0c6f924ed2f734af"
+  integrity sha512-GDzDmNgWNc9GNzTcSLTi6DU6mzSPupVJoStIi7cF3GjwSE9q1cVakbvAAVSt59vzUjV9JJoSZFKoo9krbjKd2g==
   dependencies:
     async-foreach "^0.1.3"
     chalk "^1.1.1"