diff --git a/app/build.gradle b/app/build.gradle
index 1aa76e058..8c837a2c0 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -25,7 +25,8 @@ android {
         }
     } */
     compileSdkVersion 29
-    buildToolsVersion "30.0.2" // Note: 30.0.0.2 doesn't yet work on Github actions CI
+    // leave undefined to use version plugin wants
+    // buildToolsVersion "30.0.2" // Note: 30.0.2 doesn't yet work on Github actions CI
     defaultConfig {
         applicationId "com.geeksville.mesh"
         minSdkVersion 21 // The oldest emulator image I have tried is 22 (though 21 probably works)