diff --git a/package.json b/package.json
index 532545f..67299b8 100644
--- a/package.json
+++ b/package.json
@@ -21,7 +21,7 @@
     "nyc": "15.1.0",
     "rimraf": "3.0.2",
     "tslint": "6.1.3",
-    "typescript": "3.9.7"
+    "typescript": "4.3.4"
   },
   "dependencies": {
     "param-type": "^1.1.1"