diff --git a/package.json b/package.json
index 430227e..7956ace 100644
--- a/package.json
+++ b/package.json
@@ -34,7 +34,7 @@
     "onchange": "^7.1.0",
     "prettier": "^2.2.1",
     "ts-jest": "^25.5.1",
-    "typescript": "^3.9.8"
+    "typescript": "^3.9.9"
   },
   "dependencies": {
     "axios": "^0.21.0",
diff --git a/yarn.lock b/yarn.lock
index 0c1864f..264208d 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -4555,10 +4555,10 @@ typedarray-to-buffer@^3.1.5:
   dependencies:
     is-typedarray "^1.0.0"
 
-typescript@^3.9.8:
-  version "3.9.8"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.9.8.tgz#7d937ba4e4044af7fa83d127b982f8f61ca816a4"
-  integrity sha512-nDbnFkUZZjkQ92qwKX+C+jtk4OGfU8H9toSEs3uAsl8cxLjG2sqQm6leF/pLWvm9FAEJ6KHkYMAbHYaY2ITeVg==
+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==
 
 undefsafe@^2.0.3:
   version "2.0.3"