diff --git a/package.json b/package.json
index 3068766..f45e4f9 100644
--- a/package.json
+++ b/package.json
@@ -55,7 +55,7 @@
     "nyc": "15.1.0",
     "simple-mock": "0.8.0",
     "tslint": "5.20.1",
-    "typescript": "3.9.5"
+    "typescript": "3.9.9"
   },
   "peerDependencies": {
     "graphql-subscriptions": "^1.1.0"
diff --git a/yarn.lock b/yarn.lock
index 761fc72..4c889f7 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2341,10 +2341,10 @@ typedarray@^0.0.6:
   version "0.0.6"
   resolved "https://registry.yarnpkg.com/typedarray/-/typedarray-0.0.6.tgz#867ac74e3864187b1d3d47d996a78ec5c8830777"
 
-typescript@3.9.5:
-  version "3.9.5"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.9.5.tgz#586f0dba300cde8be52dd1ac4f7e1009c1b13f36"
-  integrity sha512-hSAifV3k+i6lEoCJ2k6R2Z/rp/H3+8sdmcn5NrS3/3kE7+RyZXm9aqvxWqjEXHAd8b0pShatpcdMTvEdvAJltQ==
+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==
 
 ultron@~1.1.0:
   version "1.1.0"