diff --git a/package.json b/package.json
index 395bb38c..c5d9c17d 100644
--- a/package.json
+++ b/package.json
@@ -39,7 +39,7 @@
     "stylelint": "9.10.1",
     "tern-lint": "0.6.0",
     "tslint": "5.20.1",
-    "typescript": "3.9.9",
+    "typescript": "4.2.4",
     "write-good": "1.0.8",
     "xo": "0.40.1"
   },