diff --git a/android/build.gradle b/android/build.gradle
index 7578cdf..039a60e 100644
--- a/android/build.gradle
+++ b/android/build.gradle
@@ -1,6 +1,10 @@
 group = "io.agora.agorartm.agora_rtm"
 version = "1.0"
 
+def safeExtGet(prop, fallback) {
+    rootProject.ext.has(prop) ? rootProject.ext.get(prop) : fallback
+}
+
 buildscript {
     repositories {
         google()
@@ -26,7 +30,7 @@ android {
         namespace = "io.agora.agorartm.agora_rtm"
     }
 
-    compileSdk = 34
+    compileSdkVersion safeExtGet('compileSdkVersion', 31)
 
     compileOptions {
         sourceCompatibility = JavaVersion.VERSION_1_8
@@ -34,6 +38,7 @@ android {
     }
 
     defaultConfig {
+        minSdkVersion safeExtGet('minSdkVersion', 21)
         minSdk = 16
         consumerProguardFiles 'consumer-rules.pro'
     }
@@ -45,6 +50,13 @@ android {
         }
     }
 
+    externalNativeBuild {
+        cmake {
+            path '../src/CMakeLists.txt'
+            arguments '-DANDROID_STL=c++_static'
+        }
+    }
+
     dependencies {
         testImplementation("junit:junit:4.13.2")
         testImplementation("org.mockito:mockito-core:5.0.0")