diff --git a/package.json b/package.json
index 38b4cbd..7159207 100644
--- a/package.json
+++ b/package.json
@@ -53,7 +53,7 @@
     "ts-node": "8.5.4",
     "tsconfig-paths": "3.9.0",
     "tslint": "5.20.1",
-    "typescript": "3.5.3",
+    "typescript": "3.9.9",
     "wait-on": "^3.3.0"
   },
   "jest": {
diff --git a/yarn.lock b/yarn.lock
index bcf00a0..edcbc85 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -4873,10 +4873,10 @@ typedarray@^0.0.6:
   resolved "https://registry.yarnpkg.com/typedarray/-/typedarray-0.0.6.tgz#867ac74e3864187b1d3d47d996a78ec5c8830777"
   integrity sha1-hnrHTjhkGHsdPUfZlqeOxciDB3c=
 
-typescript@3.5.3:
-  version "3.5.3"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.5.3.tgz#c830f657f93f1ea846819e929092f5fe5983e977"
-  integrity sha512-ACzBtm/PhXBDId6a6sDJfroT2pOWt/oOnk4/dElG5G33ZL776N3Y6/6bKZJBFpd+b05F3Ct9qDjMeJmRWtE2/g==
+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@^3.1.4:
   version "3.7.2"