diff --git a/API.md b/API.md
index d0bd646..d81363c 100644
--- a/API.md
+++ b/API.md
@@ -3,16 +3,33 @@
## Structs
-### Naming
+### NamingOptions
-#### Initializer
+#### Initializer
```typescript
import { ResourceNaming } from '@gammarers/aws-resource-naming'
-const naming: ResourceNaming.Naming = { ... }
+const namingOptions: ResourceNaming.NamingOptions = { ... }
```
+#### Properties
+
+| **Name** | **Type** | **Description** |
+| --- | --- | --- |
+| naming | @gammarers/aws-resource-naming.ResourceNaming.NamingType \| {[ key: string ]: string} | *No description.* |
+
+---
+
+##### `naming`Required
+
+```typescript
+public readonly naming: NamingType | {[ key: string ]: string};
+```
+
+- *Type:* @gammarers/aws-resource-naming.ResourceNaming.NamingType | {[ key: string ]: string}
+
+---