diff --git a/package.json b/package.json
index 6e8b1c38..08799115 100644
--- a/package.json
+++ b/package.json
@@ -50,6 +50,6 @@
     "prettier": "2.2.1",
     "rimraf": "^3.0.2",
     "ts-jest": "25.5.1",
-    "typescript": "3.9.8"
+    "typescript": "3.9.9"
   }
 }
diff --git a/yarn.lock b/yarn.lock
index 2a5c0ebc..5870b048 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -4718,10 +4718,10 @@ 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==
 
 union-value@^1.0.0:
   version "1.0.1"