diff --git a/README.md b/README.md
index 307a6c82..9f0a56be 100644
--- a/README.md
+++ b/README.md
@@ -31,6 +31,8 @@ generates:
 
 You can check [example directory](https://github.com/Code-Hex/graphql-codegen-typescript-validation-schema/tree/main/example) if you want to see more complex config example or how is generated some files.
 
+...And I wrote some tips in there.
+
 ## Config API Reference
 
 ### `schema`
@@ -96,7 +98,7 @@ input ExampleInput {
 }
 ```
 
-#### yup
+#### yup schema
 
 ```yml
 generates:
@@ -136,8 +138,7 @@ export function ExampleInputSchema(): yup.SchemaOf<ExampleInput> {
 }
 ```
 
-#### zod
-
+#### zod schema
 
 ```yml
 generates:
diff --git a/example/yup/README.md b/example/yup/README.md
new file mode 100644
index 00000000..bfee2a63
--- /dev/null
+++ b/example/yup/README.md
@@ -0,0 +1,11 @@
+# Tips for yup schema
+
+## How to overwrite generated schema?
+
+You can use yup [shape API](https://github.com/jquense/yup#objectshapefields-object-nosortedges-arraystring-string-schema).
+
+```ts
+const AttributeInputSchemaWithUUID = AttributeInputSchema().shape({
+  key: z.string().uuid(),
+});
+```
\ No newline at end of file
diff --git a/example/zod/README.md b/example/zod/README.md
new file mode 100644
index 00000000..1c3d1842
--- /dev/null
+++ b/example/zod/README.md
@@ -0,0 +1,11 @@
+# Tips for zod schema
+
+## How to overwrite generated schema?
+
+You can use zod [extend API](https://github.com/colinhacks/zod#extend).
+
+```ts
+const AttributeInputSchemaWithCUID = AttributeInputSchema().extend({
+  key: z.string().cuid(),
+});
+```
\ No newline at end of file