diff --git a/package-lock.json b/package-lock.json
index 25e6464..6bc8580 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1007,9 +1007,9 @@
       }
     },
     "typescript": {
-      "version": "3.9.7",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.9.7.tgz",
-      "integrity": "sha512-BLbiRkiBzAwsjut4x/dsibSTB6yWpwT5qWmC2OfuCg3GgVQCSgMs4vEctYPhsaGtd0AeuuHMkjZ2h2WG8MSzRw==",
+      "version": "4.0.2",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-4.0.2.tgz",
+      "integrity": "sha512-e4ERvRV2wb+rRZ/IQeb3jm2VxBsirQLpQhdxplZ2MEzGvDkkMmPglecnNDfSUBivMjP93vRbngYYDQqQ/78bcQ==",
       "dev": true
     },
     "which": {
diff --git a/package.json b/package.json
index 7fb1c64..d797c35 100644
--- a/package.json
+++ b/package.json
@@ -45,7 +45,7 @@
     "expect.js": "^0.3.1",
     "mocha": "^8.1.0",
     "tslint": "^6.0.0",
-    "typescript": "^3.5.3"
+    "typescript": "^4.0.2"
   },
   "main": "lib/cue",
   "typings": "lib/cue",