diff --git a/package.json b/package.json
index 7840bf2..4452cd5 100644
--- a/package.json
+++ b/package.json
@@ -74,7 +74,7 @@
     "nyc": "13.3.0",
     "prettier": "^2.0.5",
     "sinon": "9.0.2",
-    "typescript": "^3.9.5"
+    "typescript": "^4.0.2"
   },
   "dependencies": {
     "commander": "2.20.0",