diff --git a/android/build.gradle b/android/build.gradle
index 3bd8ea0..7416ede 100644
--- a/android/build.gradle
+++ b/android/build.gradle
@@ -1,21 +1,26 @@
 buildscript {
     repositories {
-        jcenter()
+        google()
+        mavenCentral()
     }
 
     dependencies {
-        classpath 'com.android.tools.build:gradle:1.3.0'
+        classpath 'com.android.tools.build:gradle:4.2.2'
     }
 }
 
 apply plugin: 'com.android.library'
 
+def safeExtGet(prop, fallback) {
+    rootProject.ext.has(prop) ? rootProject.ext.get(prop) : fallback
+}
+
 android {
-    compileSdkVersion rootProject.ext.compileSdkVersion
+    compileSdkVersion safeExtGet("compileSdkVersion", 31)
 
     defaultConfig {
         minSdkVersion 16
-        targetSdkVersion 22
+        targetSdkVersion safeExtGet("targetSdkVersion", 31)
         versionCode 1
         versionName "1.0"
     }