diff --git a/core/fsm/src/core.ts b/core/fsm/src/core.ts
index 44331c059..d8418942b 100644
--- a/core/fsm/src/core.ts
+++ b/core/fsm/src/core.ts
@@ -12,7 +12,7 @@ import type {
   FsmTypeHelper,
   SignalConfig,
 } from './type.js';
-import type {OmitFirstParam, SingleOrArray, StringifyableRecord} from '@alwatr/type';
+import type {MaybePromise, OmitFirstParam, SingleOrArray, StringifyableRecord} from '@alwatr/type';
 
 globalAlwatr.registeredList.push({
   name: '@alwatr/fsm',
@@ -199,7 +199,7 @@ export const _execAction = (
     constructor: FsmConstructor,
     actionNames: SingleOrArray<string> | undefined,
     finiteStateMachine: FsmConsumerInterface,
-): boolean | void => {
+): boolean | MaybePromise<void> => {
   if (actionNames == null) return;
   logger.logMethodArgs('execAction', {constructorId: constructor.id, actionNames});
 
diff --git a/core/fsm/src/type.ts b/core/fsm/src/type.ts
index d6b7b17e4..4270f8751 100644
--- a/core/fsm/src/type.ts
+++ b/core/fsm/src/type.ts
@@ -1,6 +1,6 @@
 import type {finiteStateMachineConsumer} from './core.js';
 import type {DebounceType} from '@alwatr/signal';
-import type {ArrayItems, SingleOrArray, StringifyableRecord} from '@alwatr/type';
+import type {ArrayItems, MaybePromise, SingleOrArray, StringifyableRecord} from '@alwatr/type';
 
 export interface FsmConstructor {
   /**
@@ -107,7 +107,7 @@ export interface FsmInstance<
 }
 
 export type ActionRecord<T extends FsmTypeHelper = FsmTypeHelper> = {
-  readonly [P in T['TActionName']]?: (finiteStateMachine: FsmConsumerInterface<T>) => void | boolean;
+  readonly [P in T['TActionName']]?: (finiteStateMachine: FsmConsumerInterface<T>) => MaybePromise<void> | boolean;
 };
 
 export type SignalConfig<T extends FsmTypeHelper = FsmTypeHelper> = {