diff --git a/package.json b/package.json
index 2708d51f..a4fba345 100644
--- a/package.json
+++ b/package.json
@@ -67,7 +67,7 @@
     "ts-loader": "^0.8.1",
     "tslint": "^3.6.0",
     "typedoc": "^0.4.4",
-    "typescript": "^1.8.10",
+    "typescript": "^4.3.5",
     "typings": "^1.3.2",
     "webpack": "^1.12.14",
     "webpack-stream": "^3.1.0",