diff --git a/packages/node-plop/types/index.d.ts b/packages/node-plop/types/index.d.ts
index 377f6ac..a05efc4 100644
--- a/packages/node-plop/types/index.d.ts
+++ b/packages/node-plop/types/index.d.ts
@@ -215,7 +215,8 @@ export type ActionType =
   | AddManyActionConfig
   | ModifyActionConfig
   | AppendActionConfig
-  | CustomActionFunction;
+  | CustomActionFunction
+  | CustomActionConfig<string>;
 
 export interface ActionConfig {
   type: string;