diff --git a/README.md b/README.md
index 47956ff4..58018547 100644
--- a/README.md
+++ b/README.md
@@ -35,7 +35,7 @@ Java解析、生成Excel比较有名的框架有Apache poi、jxl。但他们都
         <dependency>
             <groupId>com.alibaba</groupId>
             <artifactId>easyexcel</artifactId>
-            <version>3.1.1</version>
+            <version>3.1.2</version>
         </dependency>
 ```
 
diff --git a/easyexcel-core/src/main/java/com/alibaba/excel/util/FileUtils.java b/easyexcel-core/src/main/java/com/alibaba/excel/util/FileUtils.java
index 41a4be0e..881c1437 100644
--- a/easyexcel-core/src/main/java/com/alibaba/excel/util/FileUtils.java
+++ b/easyexcel-core/src/main/java/com/alibaba/excel/util/FileUtils.java
@@ -62,7 +62,6 @@ public class FileUtils {
         // Initialize the cache directory
         File cacheFile = new File(cachePath);
         createDirectory(cacheFile);
-        cacheFile.deleteOnExit();
     }
 
     /**
@@ -160,7 +159,6 @@ public class FileUtils {
         File poiFilesPathFile = new File(poiFilesPath);
         createDirectory(poiFilesPathFile);
         TempFile.setTempFileCreationStrategy(new DefaultTempFileCreationStrategy(poiFilesPathFile));
-        poiFilesPathFile.deleteOnExit();
     }
 
     public static File createCacheTmpFile() {
diff --git a/pom.xml b/pom.xml
index d8676d5c..319a85e0 100644
--- a/pom.xml
+++ b/pom.xml
@@ -20,7 +20,7 @@
 
 
     <properties>
-        <revision>3.1.1</revision>
+        <revision>3.1.2</revision>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <jdk.version>1.8</jdk.version>
         <gpg.skip>true</gpg.skip>
diff --git a/update.md b/update.md
index 6944a0ee..b326ca07 100644
--- a/update.md
+++ b/update.md
@@ -1,3 +1,6 @@
+# 3.1.2
+* 修复长时间运行会产生大对象的bug [Issue #2725](https://github.com/alibaba/easyexcel/issues/2725)
+
 # 3.1.1
 * 修复部分xlsx无法读取超链接的bug