diff --git a/src/types.ts b/src/types.ts
index 9d9c104..421a26e 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -10,7 +10,7 @@ export interface FunctionsResponseSuccess<T> {
 }
 export interface FunctionsResponseFailure {
   data: null
-  error: any
+  error: FunctionsError
 }
 export type FunctionsResponse<T> = FunctionsResponseSuccess<T> | FunctionsResponseFailure