diff --git a/oeffi/build.gradle b/oeffi/build.gradle
index d4f8f9e..7d045ef 100644
--- a/oeffi/build.gradle
+++ b/oeffi/build.gradle
@@ -31,7 +31,7 @@ dependencies {
 
 android {
     compileSdkVersion 'android-30'
-    buildToolsVersion '29.0.3'
+    buildToolsVersion '30.0.3'
 
     defaultConfig {
         generatedDensities = ['hdpi', 'xhdpi']