diff --git a/core/build.gradle b/core/build.gradle
index 19c024a1de..2c3a561ac7 100644
--- a/core/build.gradle
+++ b/core/build.gradle
@@ -4,12 +4,11 @@ apply plugin: 'kotlin-kapt'
 apply plugin: 'kotlin-android-extensions'
 
 android {
-    compileSdkVersion 29
-    buildToolsVersion "29.0.3"
+    compileSdkVersion 28
 
     defaultConfig {
         minSdkVersion 23
-        targetSdkVersion 29
+        targetSdkVersion 28
         versionCode 1
         versionName "1.0"
 
diff --git a/core/src/main/java/info/nightscout/androidaps/core/resources/ResourceHelper.kt b/core/src/main/java/info/nightscout/androidaps/utils/resources/ResourceHelper.kt
similarity index 100%
rename from core/src/main/java/info/nightscout/androidaps/core/resources/ResourceHelper.kt
rename to core/src/main/java/info/nightscout/androidaps/utils/resources/ResourceHelper.kt
diff --git a/core/src/main/java/info/nightscout/androidaps/core/resources/ResourceHelperImplementation.kt b/core/src/main/java/info/nightscout/androidaps/utils/resources/ResourceHelperImplementation.kt
similarity index 100%
rename from core/src/main/java/info/nightscout/androidaps/core/resources/ResourceHelperImplementation.kt
rename to core/src/main/java/info/nightscout/androidaps/utils/resources/ResourceHelperImplementation.kt