diff --git a/package.json b/package.json
index d066cdba..81988b9b 100644
--- a/package.json
+++ b/package.json
@@ -48,7 +48,7 @@
     "@types/json-schema": "^7.0.3",
     "glob": "~7.1.4",
     "json-stable-stringify": "^1.0.1",
-    "typescript": "^3.5.3",
+    "typescript": "^3.9.9",
     "yargs": "^14.0.0"
   },
   "devDependencies": {
diff --git a/yarn.lock b/yarn.lock
index aa090412..713a1217 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -966,10 +966,10 @@ type-detect@^4.0.0, type-detect@^4.0.5:
   resolved "https://registry.yarnpkg.com/type-detect/-/type-detect-4.0.8.tgz#7646fb5f18871cfbb7749e69bd39a6388eb7450c"
   integrity sha512-0fr/mIH1dlO+x7TlcMy+bIDqKPsw/70tVyeHW787goQjhmqaZe10uwLujubK9q9Lg6Fiho1KUKDYz0Z7k7g5/g==
 
-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==
 
 uri-js@^4.2.2:
   version "4.2.2"