diff --git a/doric-iOS/Pod/Classes/Plugin/DoricNotificationPlugin.m b/doric-iOS/Pod/Classes/Plugin/DoricNotificationPlugin.m
index a359b1ec..9d39b2b2 100644
--- a/doric-iOS/Pod/Classes/Plugin/DoricNotificationPlugin.m
+++ b/doric-iOS/Pod/Classes/Plugin/DoricNotificationPlugin.m
@@ -22,7 +22,7 @@
 
 @interface DoricNotificationPlugin ()
 
-@property(nonatomic, copy) NSDictionary<NSString *, id> *observers;
+@property(nonatomic, strong) NSDictionary<NSString *, id> *observers;
 @end
 
 @implementation DoricNotificationPlugin