diff --git a/android/src/main/java/top/jerryyan/RN/A/VersionUpgrade/UpgradeModule.java b/android/src/main/java/top/jerryyan/RN/A/VersionUpgrade/UpgradeModule.java
index c26c4bc..538eb9e 100644
--- a/android/src/main/java/top/jerryyan/RN/A/VersionUpgrade/UpgradeModule.java
+++ b/android/src/main/java/top/jerryyan/RN/A/VersionUpgrade/UpgradeModule.java
@@ -68,26 +68,26 @@ public class UpgradeModule extends ReactContextBaseJavaModule {
         }
     }
 
-    private void _alertDialog(){
+    void _alertDialog(){
         final UpgradeModule that = this;
         AlertDialog dialog = new AlertDialog.Builder(reactContext.getCurrentActivity())
             .setTitle(TITLE)
             .setMessage(CONTENT)
             .setNeutralButton("取消",
-                    new DialogInterface.OnClickListener() {
-                        @Override
-                        public void onClick(DialogInterface dialog, int which) {
-                            dialog.dismiss();
-                        }
+                new DialogInterface.OnClickListener() {
+                    @Override
+                    public void onClick(DialogInterface dialog, int which) {
+                        dialog.dismiss();
                     }
+                }
             )
             .setNegativeButton("更新",
-                    new DialogInterface.OnClickListener() {
-                        @Override
-                        public void onClick(DialogInterface dialog, int which) {
-                            that._startDownload();
-                        }
+                new DialogInterface.OnClickListener() {
+                    @Override
+                    public void onClick(DialogInterface dialog, int which) {
+                        that._startDownload();
                     }
+                }
             )
             .show();
     }
@@ -124,25 +124,50 @@ public class UpgradeModule extends ReactContextBaseJavaModule {
                 .method("GET", null)
                 .build();
         Call call = okHttpClient.newCall(request);
-        try {
-            Response response = call.execute();
-            if(response.isSuccessful()){
-                if(response.body() == null) return;
-                String jsonText = response.body().string();
-                Log.d("VERSION CHECK", jsonText);
-                JSONObject json = new JSONObject(jsonText);
-                int status = json.getInt("status");
-                if(status > 0){
-                    CONTENT = json.getString("message");
-                    JSONObject jsonData = json.getJSONObject("data");
-                    DOWNLOAD_URL = jsonData.getString("url");
-                    this._alertDialog();
+        final Handler handler = new ShowUpgradeAlertHandler(this);
+        call.enqueue(new Callback() {
+            @Override
+            public void onFailure(Call call, IOException e) {
+                Log.e("VERSION CHECK", call.toString(), e);
+            }
+
+            @Override
+            public void onResponse(Call call, Response response) {
+                if(response.isSuccessful()){
+                    if(response.body() == null) return;
+                    try {
+                        String jsonText = response.body().string();
+                        Log.d("VERSION CHECK", jsonText);
+                        JSONObject json = new JSONObject(jsonText);
+                        int status = json.getInt("status");
+                        if(status > 0){
+                            CONTENT = json.getString("message");
+//                            String version = json.getString("version");
+                            JSONObject jsonData = json.getJSONObject("data");
+                            DOWNLOAD_URL = jsonData.getString("url");
+                            handler.sendEmptyMessage(0);
+                        }
+                    } catch (IOException e) {
+                        Log.e("REQUEST FAILED", "AAA", e);
+                    } catch (JSONException e) {
+                        Log.e("JSON FAILED", "BBB", e);
+                    }
                 }
             }
-        } catch (IOException e) {
-            e.printStackTrace();
-        } catch (JSONException e) {
-            Log.e("JSON FAILED", "BBB", e);
-        }
+        });
+    }
+}
+
+final class ShowUpgradeAlertHandler extends Handler
+{
+    private UpgradeModule module;
+
+    ShowUpgradeAlertHandler(UpgradeModule module)
+    {
+        this.module = module;
+    }
+    @Override
+    public void handleMessage(Message message){
+        module._alertDialog();
     }
 }
\ No newline at end of file