diff --git a/.changeset/spotty-spies-act.md b/.changeset/spotty-spies-act.md
new file mode 100644
index 0000000000..9c29bf8900
--- /dev/null
+++ b/.changeset/spotty-spies-act.md
@@ -0,0 +1,5 @@
+---
+"@medusajs/types": patch
+---
+
+fix(types): fix type of application_method_type filter
diff --git a/packages/core/types/src/http/promotion/admin/queries.ts b/packages/core/types/src/http/promotion/admin/queries.ts
index 4109adcdfc..0805c9a169 100644
--- a/packages/core/types/src/http/promotion/admin/queries.ts
+++ b/packages/core/types/src/http/promotion/admin/queries.ts
@@ -1,4 +1,5 @@
 import { BaseFilterable, OperatorMap } from "../../../dal"
+import { ApplicationMethodTypeValues } from "../../../promotion"
 import { FindParams, SelectParams } from "../../common"
 
 export interface AdminGetPromotionParams extends SelectParams {}
@@ -46,7 +47,7 @@ export interface AdminGetPromotionsParams
   /**
    * Filter by the promotion's application method type.
    */
-  application_method_type?: string | string[]
+  application_method_type?: ApplicationMethodTypeValues | ApplicationMethodTypeValues[]
   /**
    * An array of filters to apply on the entity, where each item in the array is joined with an "and" condition.
    */