diff --git a/core/proto/build.gradle.kts b/core/proto/build.gradle.kts
index f68a00a6d9..615074efc0 100644
--- a/core/proto/build.gradle.kts
+++ b/core/proto/build.gradle.kts
@@ -28,7 +28,7 @@ kotlin {
     jvm()
 
     // Override minSdk for ATAK compatibility (standard is 26)
-    androidLibrary { minSdk = 21 }
+    android { minSdk = 21 }
 
     sourceSets { commonMain.dependencies { api(libs.wire.runtime) } }
 }
@@ -39,6 +39,10 @@ wire {
         srcDir("src/main/wire-includes")
     }
     kotlin {
+        // Wire 6 optimization: Avoid unnecessary immutable copies of repeated/map fields.
+        // Improves performance by reducing allocations when decoding/creating messages.
+        makeImmutableCopies = false
+
         // Flattens 'oneof' fields into nullable properties on the parent class.
         // This removes the intermediate sealed classes, simplifying usage and reducing method count/binary size.
         // Codebase is already written to use the nullable properties (e.g. packet.decoded vs
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index 86446fc332..d8329ad2f1 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -55,7 +55,7 @@ markdownRenderer = "0.39.2"
 okio = "3.16.4"
 osmdroid-android = "6.1.20"
 spotless = "8.3.0"
-wire = "6.0.0-alpha02"
+wire = "6.0.0-alpha03"
 vico = "3.0.2"
 dependency-guard = "0.5.0"
 nordic-ble = "2.0.0-alpha15"