diff --git a/app/src/main/java/com/vector/appupdatedemo/MainActivity.java b/app/src/main/java/com/vector/appupdatedemo/MainActivity.java
index 195bd82..17384b7 100644
--- a/app/src/main/java/com/vector/appupdatedemo/MainActivity.java
+++ b/app/src/main/java/com/vector/appupdatedemo/MainActivity.java
@@ -254,7 +254,7 @@ protected UpdateAppBean parseJson(String json) {
                                     //更新内容
                                     .setUpdate_log(jsonObject.getString("update_log"))
                                     //是否强制更新
-                                    .setConstraint(jsonObject.getBoolean("constraint"));
+                                    .setConstraint(true);
                         } catch (JSONException e) {
                             e.printStackTrace();
                         }
diff --git a/update-app/build.gradle b/update-app/build.gradle
index abe161a..41b01a9 100644
--- a/update-app/build.gradle
+++ b/update-app/build.gradle
@@ -41,7 +41,7 @@ publish {
     userOrg = 'qianwen'//bintray.com用户名
     groupId = 'com.qianwen'//jcenter上的路径
     artifactId = 'update-app'//项目名称
-    publishVersion = '3.2.3'//版本号
+    publishVersion = '3.2.4'//版本号
     desc = 'App update tools'
     website = 'https://github.com/WVector/AppUpdateDemo'
 }
diff --git a/update-app/src/main/AndroidManifest.xml b/update-app/src/main/AndroidManifest.xml
index 09ca299..940d37a 100644
--- a/update-app/src/main/AndroidManifest.xml
+++ b/update-app/src/main/AndroidManifest.xml
@@ -11,7 +11,6 @@
         <activity
             android:name=".DialogActivity"
             android:configChanges="keyboardHidden|orientation|locale|screenSize"
-            android:launchMode="singleInstance"
             android:screenOrientation="portrait"
             android:theme="@style/UpdateAppDialog"
             android:windowSoftInputMode="adjustPan|stateHidden">
diff --git a/update-app/src/main/java/com/vector/update_app/DialogActivity.java b/update-app/src/main/java/com/vector/update_app/DialogActivity.java
index 4de6fad..6c07fa3 100644
--- a/update-app/src/main/java/com/vector/update_app/DialogActivity.java
+++ b/update-app/src/main/java/com/vector/update_app/DialogActivity.java
@@ -1,6 +1,7 @@
 package com.vector.update_app;
 
 import android.content.ComponentName;
+import android.content.Intent;
 import android.content.ServiceConnection;
 import android.graphics.Color;
 import android.os.Bundle;
@@ -246,7 +247,10 @@ public void onBackPressed() {
         //禁用
         if (mUpdateApp != null && mUpdateApp.isConstraint()) {
 //          ActManager.getInstance().finishAllActivity();
-            android.os.Process.killProcess(android.os.Process.myPid());
+//            android.os.Process.killProcess(android.os.Process.myPid());
+            //返回桌面
+            startActivity(new Intent(Intent.ACTION_MAIN).addCategory(Intent.CATEGORY_HOME));
+            return;
         }
         super.onBackPressed();
     }