diff --git a/app/build.gradle b/app/build.gradle
index 7c9a95a3..139657c0 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -1,8 +1,8 @@
 apply plugin: 'com.android.application'
 
 android {
-    compileSdkVersion 29
-    buildToolsVersion '29.0.2'
+    compileSdkVersion 28
+    buildToolsVersion '28.0.3'
 
     defaultConfig {
         minSdkVersion 19
diff --git a/build.gradle b/build.gradle
index 1d4b35e0..bdfedd59 100644
--- a/build.gradle
+++ b/build.gradle
@@ -6,7 +6,7 @@ buildscript {
 
     dependencies {
         classpath 'com.android.tools:r8:1.6.84'
-        classpath 'com.android.tools.build:gradle:4.0.1'
+        classpath 'com.android.tools.build:gradle:4.0.0'
         classpath 'com.github.dcendents:android-maven-gradle-plugin:2.1'
     }
 }