diff --git a/package.json b/package.json
index df422086..92a297ef 100644
--- a/package.json
+++ b/package.json
@@ -51,7 +51,7 @@
     "rollup": "^2.26.10",
     "standardx": "^5.0.0",
     "ts-transform-default-export": "^1.0.2",
-    "typescript": "^3.9.7"
+    "typescript": "^4.0.0"
   },
   "files": [
     "build",