diff --git a/website/docs/define-actions/action-utils.md b/website/docs/define-actions/action-utils.md
index 6628923..da08ab7 100644
--- a/website/docs/define-actions/action-utils.md
+++ b/website/docs/define-actions/action-utils.md
@@ -18,7 +18,7 @@ Starting from v7.4.0, you can now pass optional `throwServerError` and `throwVal
 - `onError`: called when action execution fails (validation errors or server error).
 - `onSettled`: called when action execution succeeds or fails.
 
-With action callbacks you can perform custom logic after the action is executed, on the server side. You can pass them to [`action`/`stateAction`](/docs/define-actions/instance-methods#action--stateaction) method in the second argument, after the server code function. They don't return anything and can be async or not.
+With action callbacks you can perform custom logic after the action is executed, on the server side. You can pass them to [`action`/`stateAction`](/docs/define-actions/instance-methods#action--stateaction) method as the second argument, after the server code function. Their return value is not used and they **must** be async functions.
 
 ```tsx
 import { actionClient } from "@/lib/safe-action";
@@ -29,7 +29,7 @@ const action = actionClient
   .action(async () => {
     // ...
   }, {
-    onSuccess: ({
+    onSuccess: async ({
       data,
       ctx,
       metadata,
@@ -39,22 +39,24 @@ const action = actionClient
       bindArgsParsedInputs,
       hasRedirected,
       hasNotFound,
+      hasForbidden
     }) => {},
-    onError: ({
+    onError: async ({
       error,
       ctx,
       metadata,
       clientInput,
       bindArgsClientInputs
     }) => {},
-    onSettled: ({
+    onSettled: async ({
       result,
       ctx,
       metadata,
       clientInput,
       bindArgsClientInputs,
       hasRedirected,
-      hasNotFound
+      hasNotFound,
+      hasForbidden
     }) => {},
   });
 ```
\ No newline at end of file
diff --git a/website/docs/define-actions/instance-methods.md b/website/docs/define-actions/instance-methods.md
index 9be92ec..3d48e87 100644
--- a/website/docs/define-actions/instance-methods.md
+++ b/website/docs/define-actions/instance-methods.md
@@ -31,7 +31,7 @@ metadata(data: Metadata) => new SafeActionClient()
 schema(inputSchema: S, utils?: { handleValidationErrorsShape?: HandleValidationErrorsShapeFn } }) => new SafeActionClient()
 ```
 
-`schema` accepts an input schema of type `Schema` or a function that returns a promise of type `Schema` and an optional `utils` object that accepts a [`handleValidationErrorsShape`](/docs/define-actions/validation-errors#customize-validation-errors-format) function. The schema is used to define the arguments that the safe action will receive, the optional [`handleValidationErrorsShape`](/docs/define-actions/validation-errors#customize-validation-errors-format) function is used to return a custom format for validation errors. If you don't pass an input schema, `parsedInput` and validation errors will be typed `undefined`, and `clientInput` will be typed `void`. It returns a new instance of the safe action client.
+`schema` accepts an input schema of type `Schema` or a function that returns a promise of type `Schema` and an optional `utils` object that accepts an async [`handleValidationErrorsShape`](/docs/define-actions/validation-errors#customize-validation-errors-format) function. The schema is used to define the arguments that the safe action will receive, the optional [`handleValidationErrorsShape`](/docs/define-actions/validation-errors#customize-validation-errors-format) function is used to return a custom format for validation errors. If you don't pass an input schema, `parsedInput` and validation errors will be typed `undefined`, and `clientInput` will be typed `void`. It returns a new instance of the safe action client.
 
 ### `bindArgsSchemas`
 
@@ -39,7 +39,7 @@ schema(inputSchema: S, utils?: { handleValidationErrorsShape?: HandleValidationE
 bindArgsSchemas(bindArgsSchemas: BAS, bindArgsUtils?: { handleBindArgsValidationErrorsShape?: HandleBindArgsValidationErrorsShapeFn }) => new SafeActionClient()
 ```
 
-`bindArgsSchemas` accepts an array of bind input schemas of type `Schema[]` and an optional `bindArgsUtils` object that accepts a `handleBindArgsValidationErrorsShape` function. The schema is used to define the bind arguments that the safe action will receive, the optional `handleBindArgsValidationErrorsShape` function is used to [return a custom format for bind arguments validation errors](/docs/define-actions/validation-errors#customize-validation-errors-format). It returns a new instance of the safe action client.
+`bindArgsSchemas` accepts an array of bind input schemas of type `Schema[]` and an optional `bindArgsUtils` object that accepts an async [`handleBindArgsValidationErrorsShape`](/docs/define-actions/validation-errors#customize-validation-errors-format) function. The schema is used to define the bind arguments that the safe action will receive, the optional [`handleBindArgsValidationErrorsShape`](/docs/define-actions/validation-errors#customize-validation-errors-format) function is used to [return a custom format for bind arguments validation errors](/docs/define-actions/validation-errors#customize-validation-errors-format). It returns a new instance of the safe action client.
 
 ### `outputSchema`
 
diff --git a/website/docs/define-actions/validation-errors.md b/website/docs/define-actions/validation-errors.md
index 2b9a50c..1ad0749 100644
--- a/website/docs/define-actions/validation-errors.md
+++ b/website/docs/define-actions/validation-errors.md
@@ -11,7 +11,7 @@ next-safe-action, by default, emulates Zod's [`format`](https://zod.dev/ERROR_HA
 
 This can be customized both at the safe action client level and at the action level by:
 - using [`defaultValidationErrorsShape`](/docs/define-actions/create-the-client#defaultvalidationerrorsshape) optional property in `createSafeActionClient`;
-- using `handleValidationErrorsShape` and `handleBindArgsValidationErrorsShape` optional functions in [`schema`](/docs/define-actions/instance-methods#schema) and [`bindArgsSchemas`](/docs/define-actions/instance-methods#bindargsschemas) methods.
+- using `handleValidationErrorsShape` and `handleBindArgsValidationErrorsShape` optional async functions in [`schema`](/docs/define-actions/instance-methods#schema) and [`bindArgsSchemas`](/docs/define-actions/instance-methods#bindargsschemas) methods.
 
 The second way overrides the shape set at the instance level, per action.
 
@@ -39,13 +39,13 @@ export const loginUser = actionClient
     // Here we use the `flattenValidationErrors` function to customize the returned validation errors
     // object to the client.
     // highlight-next-line
-    handleValidationErrorsShape: (ve, utils) => flattenValidationErrors(ve).fieldErrors,
+    handleValidationErrorsShape: async (ve, utils) => flattenValidationErrors(ve).fieldErrors,
   })
   .bindArgsSchemas(bindArgsSchemas, {
     // Here we use the `flattenBindArgsValidatonErrors` function to customize the returned bind args
     // validation errors object array to the client.
     // highlight-next-line
-    handleBindArgsValidationErrorsShape: (ve, utils) => flattenBindArgsValidationErrors(ve),
+    handleBindArgsValidationErrorsShape: async (ve, utils) => flattenBindArgsValidationErrors(ve),
   })
   .action(async ({ parsedInput: { username, password } }) => {
     // Your code here...
diff --git a/website/docs/getting-started.mdx b/website/docs/getting-started.mdx
index cb48639..68383ff 100644
--- a/website/docs/getting-started.mdx
+++ b/website/docs/getting-started.mdx
@@ -16,6 +16,10 @@ import TabItem from '@theme/TabItem';
 - A supported validation library: Zod, Valibot, Yup, TypeBox
 :::
 
+:::warning
+Next.js >= 15.0.5 is required for using next-safe-action >= 7.9.10. This is due to internal error handling framework changes. So, please upgrade to the latest version to use this library with Next.js 15.0.5 or later.
+:::
+
 **next-safe-action** provides a typesafe Server Actions implementation for Next.js App Router applications.
 
 ## Installation