diff --git a/README.md b/README.md
index 176f580..4b9e728 100755
--- a/README.md
+++ b/README.md
@@ -389,12 +389,12 @@ require("lz.n").register_handler(handler)
 #### `lz.n.Handler`
 
 <!-- markdownlint-disable MD013 -->
-| Property   | Type                       | Description                                               |
-| ---        | ---                        | ---                                                       |
-| spec_field | `string`                   | the `lz.n.PluginSpec` field used to configure the handler |
-| add        | `fun(plugin: lz.n.Plugin)` | adds a plugin to the handler                              |
-| del        | `fun(name: string)`        | removes a plugin from the handler by name                 |
-| lookup     | `fun(name: string`         | lookup a plugin managed by this handler by name           |
+| Property   | Type                              | Description                                               |
+| ---        | ---                               | ---                                                       |
+| spec_field | `string`                          | the `lz.n.PluginSpec` field used to configure the handler |
+| add        | `fun(plugin: lz.n.Plugin)`        | adds a plugin to the handler                              |
+| del        | `fun(name: string)`               | removes a plugin from the handler by name                 |
+| lookup     | `fun(name: string): lz.n.Plugin?` | lookup a plugin managed by this handler by name           |
 <!-- markdownlint-enable MD013 -->
 
 > [!TIP]