diff --git a/package.json b/package.json
index c472b04..04f1281 100644
--- a/package.json
+++ b/package.json
@@ -67,6 +67,6 @@
     "rollup-plugin-node-resolve": "^5.0.0",
     "rollup-plugin-terser": "^7.0.0",
     "sinon": "^9.0.0",
-    "typescript": "^3.5.1"
+    "typescript": "^4.0.2"
   }
 }