diff --git a/packages/svelte/src/internal/shared/types.d.ts b/packages/svelte/src/internal/shared/types.d.ts
index 89cb28f6ec..c239e3fd5d 100644
--- a/packages/svelte/src/internal/shared/types.d.ts
+++ b/packages/svelte/src/internal/shared/types.d.ts
@@ -11,7 +11,7 @@ export type Snapshot<T> = ReturnType<typeof $state.snapshot<T>>;
 
 export type MaybePromise<T> = T | Promise<T>;
 
-export type Decode<T> = (value: unknown) => T;
+export type Decode<T> = (value: any) => T;
 
 export type Encode<T> = (value: T) => unknown;