diff --git a/android/build.gradle b/android/build.gradle
index 53a1a73..3a2bbb0 100644
--- a/android/build.gradle
+++ b/android/build.gradle
@@ -1,12 +1,14 @@
 apply plugin: "com.android.library"
 
+def _ext = rootProject.ext
+
 android {
-    compileSdkVersion 25
-    buildToolsVersion "25.0.1"
+    compileSdkVersion _ext.has('compileSdkVersion') ? _ext.compileSdkVersion : 27
+    buildToolsVersion _ext.has('buildToolsVersion') ? _ext.buildToolsVersion : '27.0.3'
 
     defaultConfig {
-        minSdkVersion 16
-        targetSdkVersion 23
+        minSdkVersion _ext.has('minSdkVersion') ? _ext.minSdkVersion : 16
+        targetSdkVersion _ext.has('targetSdkVersion') ? _ext.targetSdkVersion : 23
         versionCode 1
         versionName "1.0"
     }