diff --git a/package.json b/package.json
index 6c329efc..e74d5365 100644
--- a/package.json
+++ b/package.json
@@ -53,7 +53,7 @@
     "svg-inline-loader": "^0.8.2",
     "tslib": "^2.0.3",
     "typedoc": "^0.20.28",
-    "typescript": "^3.9.7",
+    "typescript": "^3.9.9",
     "url-loader": "^4.1.1",
     "val-loader": "3.0.0",
     "webpack": "^5.18.0",
diff --git a/yarn.lock b/yarn.lock
index 390ed79a..d03add92 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -8221,10 +8221,10 @@ typedoc@^0.20.28:
     shiki "^0.9.2"
     typedoc-default-themes "^0.12.7"
 
-typescript@^3.9.7:
-  version "3.9.7"
-  resolved "https://registry.npmjs.org/typescript/-/typescript-3.9.7.tgz"
-  integrity sha512-BLbiRkiBzAwsjut4x/dsibSTB6yWpwT5qWmC2OfuCg3GgVQCSgMs4vEctYPhsaGtd0AeuuHMkjZ2h2WG8MSzRw==
+typescript@^3.9.9:
+  version "3.9.9"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.9.9.tgz#e69905c54bc0681d0518bd4d587cc6f2d0b1a674"
+  integrity sha512-kdMjTiekY+z/ubJCATUPlRDl39vXYiMV9iyeMuEuXZh2we6zz80uovNN2WlAxmmdE/Z/YQe+EbOEXB5RHEED3w==
 
 uglify-js@^2.6.1:
   version "2.8.29"