diff --git a/html/package.json b/html/package.json
index de0957a..32b5d29 100644
--- a/html/package.json
+++ b/html/package.json
@@ -38,7 +38,7 @@
     "ts-loader": "^9.2.4",
     "tslint": "^6.1.3",
     "tslint-loader": "^3.5.4",
-    "typescript": "^4.3.5",
+    "typescript": "^4.9.4",
     "util": "^0.12.4",
     "webpack": "^5.46.0",
     "webpack-cli": "^4.7.2",
diff --git a/html/yarn.lock b/html/yarn.lock
index e18d001..927e633 100644
--- a/html/yarn.lock
+++ b/html/yarn.lock
@@ -7196,10 +7196,10 @@ typedarray@^0.0.6:
   resolved "https://registry.yarnpkg.com/typedarray/-/typedarray-0.0.6.tgz#867ac74e3864187b1d3d47d996a78ec5c8830777"
   integrity sha1-hnrHTjhkGHsdPUfZlqeOxciDB3c=
 
-typescript@^4.3.5:
-  version "4.3.5"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-4.3.5.tgz#4d1c37cc16e893973c45a06886b7113234f119f4"
-  integrity sha512-DqQgihaQ9cUrskJo9kIyW/+g0Vxsk8cDtZ52a3NGh0YNTfpUSArXSohyUGnvbPazEPLu398C0UxmKSOrPumUzA==
+typescript@^4.9.4:
+  version "4.9.4"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-4.9.4.tgz#a2a3d2756c079abda241d75f149df9d561091e78"
+  integrity sha512-Uz+dTXYzxXXbsFpM86Wh3dKCxrQqUcVMxwU54orwlJjOpO3ao8L7j5lH+dWfTwgCwIuM9GQ2kvVotzYJMXTBZg==
 
 unbox-primitive@^1.0.0:
   version "1.0.1"