diff --git a/alfa-client/tsconfig.base.json b/alfa-client/tsconfig.base.json
index 210fd016c76a0f4c30f30f797af24cca6c9d11dd..69d2b403c92b19e42c5ed9daab7c4db1216652c0 100644
--- a/alfa-client/tsconfig.base.json
+++ b/alfa-client/tsconfig.base.json
@@ -11,7 +11,7 @@
     "target": "es2015",
     "module": "esnext",
     "typeRoots": ["node_modules/@types"],
-    "lib": ["es2017", "dom"],
+    "lib": ["ES2022", "dom"],
     "skipLibCheck": true,
     "skipDefaultLibCheck": true,
     "baseUrl": ".",