diff --git a/COMPONENT_INDEX.md b/COMPONENT_INDEX.md
index 49625fd3..8a6286e9 100644
--- a/COMPONENT_INDEX.md
+++ b/COMPONENT_INDEX.md
@@ -2403,7 +2403,7 @@ None.
 ### Types
 
 ```ts
-export type MultiSelectItemId = string;
+export type MultiSelectItemId = any;
 
 export type MultiSelectItemText = string;
 
@@ -2425,7 +2425,7 @@ export interface MultiSelectItem {
 | value             | <code>let</code> | Yes      | <code>string</code>                                                                            | <code>""</code>                                                                            | Specify the multiselect value                                                         |
 | selectedIds       | <code>let</code> | Yes      | <code>MultiSelectItemId[]</code>                                                               | <code>[]</code>                                                                            | Set the selected ids                                                                  |
 | items             | <code>let</code> | Yes      | <code>MultiSelectItem[]</code>                                                                 | <code>[]</code>                                                                            | Set the multiselect items                                                             |
-| itemToString      | <code>let</code> | No       | <code>(item: MultiSelectItem) => string</code>                                                 | <code>(item) => item.text &#124;&#124; item.id</code>                                      | Override the display of a multiselect item                                            |
+| itemToString      | <code>let</code> | No       | <code>(item: MultiSelectItem) => any</code>                                                    | <code>(item) => item.text &#124;&#124; item.id</code>                                      | Override the display of a multiselect item                                            |
 | size              | <code>let</code> | No       | <code>"sm" &#124; "lg" &#124; "xl"</code>                                                      | --                                                                                         | Set the size of the combobox                                                          |
 | type              | <code>let</code> | No       | <code>"default" &#124; "inline"</code>                                                         | <code>"default"</code>                                                                     | Specify the type of multiselect                                                       |
 | direction         | <code>let</code> | No       | <code>"bottom" &#124; "top"</code>                                                             | <code>"bottom"</code>                                                                      | Specify the direction of the multiselect dropdown menu                                |
@@ -2456,14 +2456,14 @@ None.
 
 ### Events
 
-| Event name | Type       | Detail                                                                                              |
-| :--------- | :--------- | :-------------------------------------------------------------------------------------------------- |
-| select     | dispatched | <code>{ selectedIds: string[]; selected: MultiSelectItem[]; unselected: MultiSelectItem[]; }</code> |
-| clear      | dispatched | <code>any</code>                                                                                    |
-| keydown    | forwarded  | --                                                                                                  |
-| keyup      | forwarded  | --                                                                                                  |
-| focus      | forwarded  | --                                                                                                  |
-| blur       | forwarded  | --                                                                                                  |
+| Event name | Type       | Detail                                                                                                         |
+| :--------- | :--------- | :------------------------------------------------------------------------------------------------------------- |
+| select     | dispatched | <code>{ selectedIds: MultiSelectItemId[]; selected: MultiSelectItem[]; unselected: MultiSelectItem[]; }</code> |
+| clear      | dispatched | <code>any</code>                                                                                               |
+| keydown    | forwarded  | --                                                                                                             |
+| keyup      | forwarded  | --                                                                                                             |
+| focus      | forwarded  | --                                                                                                             |
+| blur       | forwarded  | --                                                                                                             |
 
 ## `NotificationActionButton`
 
diff --git a/docs/src/COMPONENT_API.json b/docs/src/COMPONENT_API.json
index 9816055b..bdc49565 100644
--- a/docs/src/COMPONENT_API.json
+++ b/docs/src/COMPONENT_API.json
@@ -6409,7 +6409,7 @@
           "name": "itemToString",
           "kind": "let",
           "description": "Override the display of a multiselect item",
-          "type": "(item: MultiSelectItem) => string",
+          "type": "(item: MultiSelectItem) => any",
           "value": "(item) => item.text || item.id",
           "isFunction": true,
           "isFunctionDeclaration": false,
@@ -6749,7 +6749,7 @@
         {
           "type": "dispatched",
           "name": "select",
-          "detail": "{ selectedIds: string[]; selected: MultiSelectItem[]; unselected: MultiSelectItem[]; }"
+          "detail": "{ selectedIds: MultiSelectItemId[]; selected: MultiSelectItem[]; unselected: MultiSelectItem[]; }"
         },
         { "type": "dispatched", "name": "clear", "detail": "any" },
         { "type": "forwarded", "name": "keydown", "element": "input" },
@@ -6759,9 +6759,9 @@
       ],
       "typedefs": [
         {
-          "type": "string",
+          "type": "any",
           "name": "MultiSelectItemId",
-          "ts": "type MultiSelectItemId = string"
+          "ts": "type MultiSelectItemId = any"
         },
         {
           "type": "string",
diff --git a/types/MultiSelect/MultiSelect.svelte.d.ts b/types/MultiSelect/MultiSelect.svelte.d.ts
index b3abbcb7..dd5ceb30 100644
--- a/types/MultiSelect/MultiSelect.svelte.d.ts
+++ b/types/MultiSelect/MultiSelect.svelte.d.ts
@@ -1,7 +1,7 @@
 /// <reference types="svelte" />
 import { SvelteComponentTyped } from "svelte";
 
-export type MultiSelectItemId = string;
+export type MultiSelectItemId = any;
 
 export type MultiSelectItemText = string;
 
@@ -22,7 +22,7 @@ export interface MultiSelectProps
    * Override the display of a multiselect item
    * @default (item) => item.text || item.id
    */
-  itemToString?: (item: MultiSelectItem) => string;
+  itemToString?: (item: MultiSelectItem) => any;
 
   /**
    * Set the selected ids
@@ -210,7 +210,7 @@ export default class MultiSelect extends SvelteComponentTyped<
   MultiSelectProps,
   {
     select: CustomEvent<{
-      selectedIds: string[];
+      selectedIds: MultiSelectItemId[];
       selected: MultiSelectItem[];
       unselected: MultiSelectItem[];
     }>;