diff --git a/doric-iOS/Pod/Classes/Plugin/DoricStoragePlugin.m b/doric-iOS/Pod/Classes/Plugin/DoricStoragePlugin.m
index 95be9b1d..6fa6be20 100644
--- a/doric-iOS/Pod/Classes/Plugin/DoricStoragePlugin.m
+++ b/doric-iOS/Pod/Classes/Plugin/DoricStoragePlugin.m
@@ -74,8 +74,8 @@ - (void)getItem:(NSDictionary *)argument withPromise:(DoricPromise *)promise {
     NSString *zone = argument[@"zone"];
     NSString *key = argument[@"key"];
     YYDiskCache *diskCache = [self getDiskCache:zone];
-    [diskCache objectForKey:key withBlock:^(NSString *key, NSString *value) {
-        [promise resolve:value];
+    [diskCache objectForKey:key withBlock:^(NSString *_Nonnull key, id <NSCoding> _Nullable object) {
+        [promise resolve:object];
     }];
 }