diff --git a/package.json b/package.json
index b967a337..0698e56b 100644
--- a/package.json
+++ b/package.json
@@ -45,7 +45,7 @@
     "mocha": "^5.2.0",
     "nyc": "^12.0.2",
     "should": "^8.4.0",
-    "typescript": "^2.8.3"
+    "typescript": "^4.0.3"
   },
   "dependencies": {
     "async": "^2.6.0",