diff --git a/examples/html-demo/tsconfig.json b/examples/html-demo/tsconfig.json
index 50b8061b..cba98f94 100644
--- a/examples/html-demo/tsconfig.json
+++ b/examples/html-demo/tsconfig.json
@@ -1,6 +1,7 @@
 {
   "extends": "../../tsconfig.base.json",
   "compilerOptions": {
+    "lib": ["ES2020", "DOM", "DOM.Iterable"],
     "baseUrl": "."
   },
   "include": ["src"]
diff --git a/examples/react-demo/tsconfig.json b/examples/react-demo/tsconfig.json
index 40aa8ebc..69d97267 100644
--- a/examples/react-demo/tsconfig.json
+++ b/examples/react-demo/tsconfig.json
@@ -3,6 +3,7 @@
   "compilerOptions": {
     "jsx": "react-jsx",
     "jsxImportSource": "react",
+    "lib": ["ES2020", "DOM", "DOM.Iterable"],
     "baseUrl": "."
   },
   "include": ["src"]
diff --git a/site/tsconfig.json b/site/tsconfig.json
index 12106210..3246704e 100644
--- a/site/tsconfig.json
+++ b/site/tsconfig.json
@@ -3,6 +3,7 @@
   "compilerOptions": {
     "jsx": "react-jsx",
     "jsxImportSource": "react",
+    "lib": ["ES2020", "DOM", "DOM.Iterable"],
     "baseUrl": ".",
     "paths": {
       "@/*": ["src/*"]