diff --git a/android/src/main/java/cn/reactnative/modules/update/UpdateContext.java b/android/src/main/java/cn/reactnative/modules/update/UpdateContext.java
index 1902701..a03f6dd 100644
--- a/android/src/main/java/cn/reactnative/modules/update/UpdateContext.java
+++ b/android/src/main/java/cn/reactnative/modules/update/UpdateContext.java
@@ -5,6 +5,7 @@ import android.content.SharedPreferences;
 import android.content.pm.PackageInfo;
 import android.content.pm.PackageManager;
 import android.util.Log;
+import com.facebook.react.ReactInstanceManager;
 
 import java.util.concurrent.Executor;
 import java.util.concurrent.Executors;
@@ -21,6 +22,7 @@ public class UpdateContext {
     private Executor executor;
 
     public static boolean DEBUG = false;
+    private static ReactInstanceManager mReactInstanceManager;
 
     public UpdateContext(Context context) {
         this.context = context;
@@ -160,6 +162,15 @@ public class UpdateContext {
         this.clearUp();
     }
 
+
+    public static void setCustomInstanceManager(ReactInstanceManager instanceManager) {
+        mReactInstanceManager = instanceManager;
+    }
+
+    public ReactInstanceManager getCustomReactInstanceManager() {
+        return mReactInstanceManager;
+    }
+
     public static String getBundleUrl(Context context) {
         return new UpdateContext(context.getApplicationContext()).getBundleUrl();
     }
diff --git a/android/src/main/java/cn/reactnative/modules/update/UpdateModule.java b/android/src/main/java/cn/reactnative/modules/update/UpdateModule.java
index 92ccc53..5038479 100644
--- a/android/src/main/java/cn/reactnative/modules/update/UpdateModule.java
+++ b/android/src/main/java/cn/reactnative/modules/update/UpdateModule.java
@@ -127,7 +127,11 @@ public class UpdateModule extends ReactContextBaseJavaModule{
                     updateContext.switchVersion(hash);
                     Activity activity = getCurrentActivity();
                     Application application = activity.getApplication();
-                    ReactInstanceManager instanceManager = ((ReactApplication) application).getReactNativeHost().getReactInstanceManager();
+                    ReactInstanceManager instanceManager = updateContext.getCustomReactInstanceManager();
+
+                    if (instanceManager == null) {
+                        instanceManager = ((ReactApplication) application).getReactNativeHost().getReactInstanceManager();
+                    }
 
                     try {
                         Field jsBundleField = instanceManager.getClass().getDeclaredField("mJSBundleFile");
diff --git a/lib/getHost.js b/lib/getHost.js
index b5e97b1..b0a46aa 100644
--- a/lib/getHost.js
+++ b/lib/getHost.js
@@ -1,4 +1,4 @@
-let availableDomain = 'update.reactnative.cn';
+let availableDomain = 'update.react-native.cn';
 
 function ping(domain, rejectImmediate) {
   return new Promise((resolve, reject) => {
diff --git a/package.json b/package.json
index 616ceca..2e21a5e 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "react-native-update",
-  "version": "5.5.6",
+  "version": "5.5.7",
   "description": "react-native hot update",
   "main": "lib/index.js",
   "scripts": {