diff --git a/bytedesk_demo/README.md b/bytedesk_demo/README.md
index 5c7e603..0a458a2 100644
--- a/bytedesk_demo/README.md
+++ b/bytedesk_demo/README.md
@@ -40,6 +40,11 @@
 
 - BytedeskKefu.startWorkGroupChat(context, workGroupWid, "技能组客服");
 
+<!-- ### 打包 -->
+<!-- - Step 1. flutter build apk --debug
+- Step 2. flutter build apk --profile
+- Step 3. flutter build apk --release -->
+
 ### 集成完毕
 
 | image1 | image2 | image3 |
diff --git a/bytedesk_demo/android/build.gradle b/bytedesk_demo/android/build.gradle
index 1209e4c..1a66b20 100644
--- a/bytedesk_demo/android/build.gradle
+++ b/bytedesk_demo/android/build.gradle
@@ -7,7 +7,8 @@ buildscript {
     }
 
     dependencies {
-        classpath 'com.android.tools.build:gradle:4.1.0'
+        // classpath 'com.android.tools.build:gradle:4.1.0'
+        classpath 'com.android.tools.build:gradle:3.5.4'
     }
 }
 
diff --git a/bytedesk_demo/android/gradle/wrapper/gradle-wrapper.properties b/bytedesk_demo/android/gradle/wrapper/gradle-wrapper.properties
index e5e73da..f739632 100644
--- a/bytedesk_demo/android/gradle/wrapper/gradle-wrapper.properties
+++ b/bytedesk_demo/android/gradle/wrapper/gradle-wrapper.properties
@@ -3,4 +3,5 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.6.1-all.zip
+# distributionUrl=https\://services.gradle.org/distributions/gradle-6.6.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.6.2-all.zip