diff --git a/AR-Android-Tutorial-1to1/sample/app/build.gradle b/AR-Android-Tutorial-1to1/sample/app/build.gradle
index bcb82ee..7ea9658 100644
--- a/AR-Android-Tutorial-1to1/sample/app/build.gradle
+++ b/AR-Android-Tutorial-1to1/sample/app/build.gradle
@@ -36,5 +36,5 @@ dependencies {
     androidTestImplementation 'androidx.test.ext:junit:1.1.1'
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
     implementation project(path: ':logger')
-    implementation 'io.anyrtc:rtc:4.2.0'
+    implementation 'io.anyrtc:rtc:4.2.1.1'
 }
\ No newline at end of file
diff --git a/AR-Android-Tutorial-1to1/sample/app/src/main/java/org/ar/ar_android_tutorial_1to1/VideoActivity.java b/AR-Android-Tutorial-1to1/sample/app/src/main/java/org/ar/ar_android_tutorial_1to1/VideoActivity.java
index 9f1c83e..0b04d58 100644
--- a/AR-Android-Tutorial-1to1/sample/app/src/main/java/org/ar/ar_android_tutorial_1to1/VideoActivity.java
+++ b/AR-Android-Tutorial-1to1/sample/app/src/main/java/org/ar/ar_android_tutorial_1to1/VideoActivity.java
@@ -197,6 +197,7 @@ private void removeLocalVideo() {
         if (rlLocal!=null){
             rlLocal.removeAllViews();
         }
+
     }
     private void startCall() {
         setupLocalVideo();
diff --git a/AR-Android-Tutorial-1to1/sample/build.gradle b/AR-Android-Tutorial-1to1/sample/build.gradle
index 5f64780..6c95cbc 100644
--- a/AR-Android-Tutorial-1to1/sample/build.gradle
+++ b/AR-Android-Tutorial-1to1/sample/build.gradle
@@ -2,6 +2,7 @@
 buildscript {
     repositories {
         google()
+        mavenCentral()
         jcenter()
     }
     dependencies {
@@ -15,6 +16,7 @@ buildscript {
 allprojects {
     repositories {
         google()
+        mavenCentral()
         jcenter()
     }
 }
diff --git a/SDK/rtc-release.aar b/SDK/rtc-release.aar
index 938fc49..e0c28c4 100644
Binary files a/SDK/rtc-release.aar and b/SDK/rtc-release.aar differ