diff --git a/frontend/src/lib/components/apps/utils.ts b/frontend/src/lib/components/apps/utils.ts
index 001c97d64e..da7d8a781a 100644
--- a/frontend/src/lib/components/apps/utils.ts
+++ b/frontend/src/lib/components/apps/utils.ts
@@ -226,18 +226,18 @@ declare function close(id: string): void;
  * @param id component's id
  * @param key property's key to validate
  */
-declare function validate(id: string, key: number): void;
+declare function validate(id: string, key: string): void;
 
 /** validate form field property 'key'
  * @param id component's id
  * @param key property's key to validate
  */
-declare function invalidate(id: string, key: number, error: string): void;
+declare function invalidate(id: string, key: string, error: string): void;
 
 /** validate all form's properties
  * @param id component's id
  */
-declare function validateAll(id: string, key: number): void;
+declare function validateAll(id: string): void;
 
 /** Clear the files of a file input component
  * @param id component's id