diff --git a/mobile/sam-node-app/android/app/build.gradle.kts b/mobile/sam-node-app/android/app/build.gradle.kts
index d578237c..3333bfe9 100644
--- a/mobile/sam-node-app/android/app/build.gradle.kts
+++ b/mobile/sam-node-app/android/app/build.gradle.kts
@@ -76,6 +76,10 @@ android {
 kotlin {
     compilerOptions {
         jvmTarget = org.jetbrains.kotlin.gradle.dsl.JvmTarget.JVM_17
+        // Kotlin 2.4 defaults the module name to "{group}:{project}"; the
+        // appfunctions compiler names a generated class after it, and ':'
+        // is not legal in an identifier.
+        moduleName = "sam_node_app"
     }
 }
 
diff --git a/mobile/sam-node-app/android/settings.gradle.kts b/mobile/sam-node-app/android/settings.gradle.kts
index 6d60887a..8533e565 100644
--- a/mobile/sam-node-app/android/settings.gradle.kts
+++ b/mobile/sam-node-app/android/settings.gradle.kts
@@ -20,7 +20,7 @@ pluginManagement {
 plugins {
     id("dev.flutter.flutter-plugin-loader") version "1.0.0"
     id("com.android.application") version "9.4.1" apply false
-    id("org.jetbrains.kotlin.android") version "2.3.20" apply false
+    id("org.jetbrains.kotlin.android") version "2.4.20" apply false
     id("com.google.gms.google-services") version "4.5.0" apply false
     id("com.google.devtools.ksp") version "2.3.12" apply false
 }