diff --git a/README.md b/README.md
index 4eb27dc..5f407f0 100644
--- a/README.md
+++ b/README.md
@@ -144,7 +144,7 @@ Persistent History Tracking Kit currently supports three transaction cleanup str
 // Each notification is cleaned up
 cleanStrategy: .byNotification(times: 1),
 // At least 60 seconds between cleanings
-cleanStrategy: byDuration(seconds: 60),
+cleanStrategy: .byDuration(seconds: 60),
 ```
 
 When the cleanup policy is set to none, cleanup can be performed at the right time by generating separate cleanup instances.
diff --git a/READMECN.md b/READMECN.md
index b29d594..4d06589 100644
--- a/READMECN.md
+++ b/READMECN.md
@@ -141,7 +141,7 @@ Persistent History Tracking Kit 目前支持三种事务清理策略：
 // 每个通知都清理
 cleanStrategy: .byNotification(times: 1),
 // 两次清理之间，至少间隔 60 秒
-cleanStrategy: byDuration(seconds: 60),
+cleanStrategy: .byDuration(seconds: 60),
 ```
 
 当清理策略设置为 none 时，可以通过生成单独的清理实例，在合适的时机进行清理。