diff --git a/app/build.gradle b/app/build.gradle
index 7aff45f57..32acadb5c 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -23,7 +23,7 @@ android {
             keyPassword '111222'
         }
     }
-    ndkVersion "21.4.7075529"
+    ndkVersion "25.0.8775105"
     compileSdkVersion 29
     buildToolsVersion "29.0.2"
     defaultConfig {
@@ -126,7 +126,7 @@ dependencies {
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
     implementation 'com.android.support:design:+'
 
-    implementation 'com.android.support:multidex:1.0.1'
+    implementation 'com.android.support:multidex:1.0.3'
 
     //WebSocket
     implementation "org.java-websocket:Java-WebSocket:1.4.0"
diff --git a/build.gradle b/build.gradle
index 792f8fe74..8a0bc75cc 100644
--- a/build.gradle
+++ b/build.gradle
@@ -8,7 +8,7 @@ buildscript {
         mavenCentral()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.5.0'
+        classpath 'com.android.tools.build:gradle:4.0.1'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
         classpath 'com.google.gms:google-services:4.3.3'
         classpath 'com.google.firebase:firebase-crashlytics-gradle:2.3.0'
diff --git a/sdkdemo/build.gradle b/sdkdemo/build.gradle
index 1ca9c242c..52874f378 100644
--- a/sdkdemo/build.gradle
+++ b/sdkdemo/build.gradle
@@ -22,7 +22,7 @@ android {
             keyPassword '111222'
         }
     }
-    ndkVersion "21.4.7075529"
+    ndkVersion "25.0.8775105"
     compileSdkVersion 29
     buildToolsVersion "29.0.2"
     defaultConfig {