diff --git a/README.md b/README.md
index 964326e..83842ca 100644
--- a/README.md
+++ b/README.md
@@ -125,7 +125,7 @@ func es.addInfiniteScrolling(animator animator: protocol<ESRefreshProtocol, ESRe
 ESPullToRefresh support for the latest expiration time and the cache refresh time, You need set an `refreshIdentifier` to your UIScrollView.
 ``` swift
 scrollView.refreshIdentifier = "Your Identifier" // Set refresh identifier
-scrollView.expriedTimeInterval = 20.0 // Set the expiration interval
+scrollView.expiredTimeInterval = 20.0 // Set the expiration interval
 ```
 You can use `es.autoPullToRefresh()` method, when the time over the last refresh interval expires automatically refreshed.
 ``` swift
diff --git a/README_CN.md b/README_CN.md
index a4eec95..b59e4b4 100644
--- a/README_CN.md
+++ b/README_CN.md
@@ -125,7 +125,7 @@ func es.addInfiniteScrolling(animator animator: protocol<ESRefreshProtocol, ESRe
 ESPullToRefresh支持最近刷新时间和过期时间缓存，您需要为UIScrollView子类设置`refreshIdentifier`标示。
 ``` swift
 scrollView.refreshIdentifier = "Your Identifier" // 设置当前ScrollView的标识
-scrollView.expriedTimeInterval = 20.0 // 设置过期时间间隔
+scrollView.expiredTimeInterval = 20.0 // 设置过期时间间隔
 ```
 你可以通过`es.autoPullToRefresh()` 方法，当上次刷新时间超过过期时间间隔时自动刷新。
 ``` swift