diff --git a/src/IttyDurable.ts b/src/IttyDurable.ts
index 7e76bbf..4f774e3 100644
--- a/src/IttyDurable.ts
+++ b/src/IttyDurable.ts
@@ -7,22 +7,30 @@ export class IttyDurable extends DurableObject {
   #persistLoaded: undefined | true
 
   // public attributes
-  persisted: undefined | true
+  persisted: any
 
   constructor(...args: any) {
     // @ts-ignore
     super(...args)
 
     return new Proxy(this, {
-      // @ts-ignore
-      get: (obj, prop, receiver, target = obj[prop]) =>
+      get: (
+        obj,
+        prop,
+        receiver,
         // @ts-ignore
-        (typeof target == 'function' && this.persist(prop))
-        || target?.bind?.(obj) || target
+        target = obj[prop],
+        fn = target?.bind?.(obj),
+      ) => {
+        if (!fn) return target
+        this.persist()
+        return async (...args: any) =>
+          this.#syncPersisted().then(() => fn(args))
+      }
     })
   }
 
-  async isLoaded() {
+  async #syncPersisted() {
     if (this.#persistLoaded) return true
     this.persisted = await this.ctx.storage.get('value')
     return this.#persistLoaded = true