diff --git a/src/index.ts b/src/index.ts
index c9985be..36b7edc 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,13 +1,21 @@
-import { getBucket } from './bucket'
+import { Bucket, getBucket } from './bucket'
+
+type Storage = {
+  local: Bucket<Record<string, any>>,
+  sync: Bucket<Record<string, any>>,
+  managed: Bucket<Record<string, any>>,
+}
+
+class StorageImpl implements Storage {
+  get local(): Bucket<Record<string, any>> { return getBucket<Record<string, any>>('local', 'local') }
+  get sync(): Bucket<Record<string, any>> { return getBucket<Record<string, any>>('sync', 'sync') }
+  get managed(): Bucket<Record<string, any>> { return getBucket<Record<string, any>>('managed', 'managed') }
+}
 
 /**
  * Buckets for each storage area.
  */
-export const storage = {
-  local: getBucket<Record<string, any>>('local', 'local'),
-  sync: getBucket<Record<string, any>>('sync', 'sync'),
-  managed: getBucket<Record<string, any>>('managed', 'managed'),
-}
+export const storage: Storage = new StorageImpl()
 
 // Workaround for @rollup/plugin-typescript
 export * from './types'