diff --git a/package-lock.json b/package-lock.json
index 89e2d03..05ec5f8 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1066,9 +1066,9 @@
       }
     },
     "typescript": {
-      "version": "3.9.7",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.9.7.tgz",
-      "integrity": "sha512-BLbiRkiBzAwsjut4x/dsibSTB6yWpwT5qWmC2OfuCg3GgVQCSgMs4vEctYPhsaGtd0AeuuHMkjZ2h2WG8MSzRw==",
+      "version": "4.3.4",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-4.3.4.tgz",
+      "integrity": "sha512-uauPG7XZn9F/mo+7MrsRjyvbxFpzemRjKEZXS4AK83oP2KKOJPvb+9cO/gmnv8arWZvhnjVOXz7B49m1l0e9Ew==",
       "dev": true
     },
     "which": {
diff --git a/package.json b/package.json
index 7fb1c64..89f95d9 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": "^4.3.4"
   },
   "main": "lib/cue",
   "typings": "lib/cue",