diff --git a/android/app/build.gradle.kts b/android/app/build.gradle.kts
index 538aafc8..b854eae4 100644
--- a/android/app/build.gradle.kts
+++ b/android/app/build.gradle.kts
@@ -25,8 +25,13 @@ android {
 
     compileOptions {
         isCoreLibraryDesugaringEnabled = true
+
+        sourceCompatibility = JavaVersion.VERSION_17
+        targetCompatibility = JavaVersion.VERSION_17
     }
 
+    kotlinOptions { jvmTarget = JavaVersion.VERSION_17.toString() }
+
     defaultConfig {
         applicationId = "dev.solsynth.solian"
         // You can update the following values to match your application needs.
@@ -71,16 +76,3 @@ flutter {
     source = "../.."
 }
 
-
-kotlin {
-  compilerOptions {
-      jvmTarget.set(org.jetbrains.kotlin.gradle.dsl.JvmTarget.JVM_21)
-  }
-  jvmToolchain(21)
-}
-
-java {
-    toolchain {
-        languageVersion.set(JavaLanguageVersion.of(21))
-    }
-}