diff --git a/package-lock.json b/package-lock.json
index bc9a8a4..d1869d7 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -21489,9 +21489,9 @@
       }
     },
     "typescript": {
-      "version": "4.1.3",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-4.1.3.tgz",
-      "integrity": "sha512-B3ZIOf1IKeH2ixgHhj6la6xdwR9QrLC5d1VKeCSY4tvkqhF2eqd9O7txNlS0PO3GrBAFIdr3L1ndNwteUbZLYg=="
+      "version": "4.3.4",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-4.3.4.tgz",
+      "integrity": "sha512-uauPG7XZn9F/mo+7MrsRjyvbxFpzemRjKEZXS4AK83oP2KKOJPvb+9cO/gmnv8arWZvhnjVOXz7B49m1l0e9Ew=="
     },
     "unfetch": {
       "version": "4.2.0",
diff --git a/package.json b/package.json
index 7e6ceb1..9b36b54 100644
--- a/package.json
+++ b/package.json
@@ -10,7 +10,7 @@
     "@guardian/types": "github:guardian/types#semver:^4.0.0",
     "react": "^17.0.1",
     "react-dom": "^17.0.1",
-    "typescript": "^4.1.3"
+    "typescript": "^4.3.4"
   },
   "devDependencies": {
     "@babel/cli": "^7.13.10",