diff --git a/.editorconfig b/.editorconfig
index c137328..a21cca2 100644
--- a/.editorconfig
+++ b/.editorconfig
@@ -4,6 +4,7 @@ ktlint_standard_annotation = disabled
 ktlint_standard_class-signature = disabled
 ktlint_standard_comment-spacing = disabled
 ktlint_standard_condition-wrapping = disabled
+ktlint_standard_function-signature = disabled
 ktlint_standard_multiline-if-else = disabled
 ktlint_standard_spacing-between-declarations-with-annotations = disabled
 ktlint_standard_trailing-comma-on-call-site = disabled
diff --git a/gordon-plugin/build.gradle.kts b/gordon-plugin/build.gradle.kts
index 92f2477..3e5575e 100644
--- a/gordon-plugin/build.gradle.kts
+++ b/gordon-plugin/build.gradle.kts
@@ -1,4 +1,4 @@
-import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
+import org.jetbrains.kotlin.gradle.dsl.JvmTarget
 
 plugins {
     `kotlin-dsl`
@@ -27,17 +27,18 @@ dependencies {
     testImplementation("io.mockk:mockk:1.12.0")
 }
 
+kotlin {
+    compilerOptions {
+        jvmTarget = JvmTarget.JVM_21
+        freeCompilerArgs.add("-Xconsistent-data-class-copy-visibility")
+    }
+}
+
 tasks.withType<JavaCompile>().configureEach {
     sourceCompatibility = "21"
     targetCompatibility = "21"
 }
 
-tasks.withType<KotlinCompile>().configureEach {
-    kotlinOptions {
-        jvmTarget = "21"
-    }
-}
-
 tasks.withType<Test>().configureEach {
     dependsOn(":test_app:assembleDebugAndroidTest")
     testLogging.exceptionFormat = org.gradle.api.tasks.testing.logging.TestExceptionFormat.FULL
diff --git a/gordon-plugin/gradle.properties b/gordon-plugin/gradle.properties
index b7fe065..92a9fda 100644
--- a/gordon-plugin/gradle.properties
+++ b/gordon-plugin/gradle.properties
@@ -1,2 +1,2 @@
 group=com.banno.gordon
-version=1.11.1
+version=1.12.0
diff --git a/gordon-plugin/src/main/kotlin/com/banno/gordon/GordonTestTask.kt b/gordon-plugin/src/main/kotlin/com/banno/gordon/GordonTestTask.kt
index c98f586..f9726c2 100644
--- a/gordon-plugin/src/main/kotlin/com/banno/gordon/GordonTestTask.kt
+++ b/gordon-plugin/src/main/kotlin/com/banno/gordon/GordonTestTask.kt
@@ -133,7 +133,7 @@ internal abstract class GordonTestTask @Inject constructor(
     }
 
     @TaskAction
-    private fun runTests() {
+    internal fun runTests() {
         runTestsCatching().fold({ throw it }, {})
     }
 
diff --git a/gradle.properties b/gradle.properties
index af8b2fb..240cec5 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,7 +1,7 @@
-androidGradlePluginVersion=8.7.2
-aapt2Version=8.7.2-12006047
-kotlinVersion=1.9.25
-kotlinterVersion=4.4.1
+androidGradlePluginVersion=8.7.3
+aapt2Version=8.7.3-12006047
+kotlinVersion=2.1.0
+kotlinterVersion=5.0.1
 gradlePluginPublishVersion=1.3.0
 org.gradle.caching=true
 org.gradle.configuration-cache=true
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 7cf748e..e0fd020 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.11-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.12-all.zip
 networkTimeout=10000
 validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME
diff --git a/gradlew b/gradlew
index f5feea6..f3b75f3 100755
--- a/gradlew
+++ b/gradlew
@@ -86,8 +86,7 @@ done
 # shellcheck disable=SC2034
 APP_BASE_NAME=${0##*/}
 # Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
-APP_HOME=$( cd -P "${APP_HOME:-./}" > /dev/null && printf '%s
-' "$PWD" ) || exit
+APP_HOME=$( cd -P "${APP_HOME:-./}" > /dev/null && printf '%s\n' "$PWD" ) || exit
 
 # Use the maximum available, or set MAX_FD != -1 to use that value.
 MAX_FD=maximum
diff --git a/test_app/build.gradle.kts b/test_app/build.gradle.kts
index a601087..45261af 100644
--- a/test_app/build.gradle.kts
+++ b/test_app/build.gradle.kts
@@ -1,3 +1,5 @@
+import org.jetbrains.kotlin.gradle.dsl.JvmTarget
+
 plugins {
     id("com.android.application")
     kotlin("android")
@@ -21,9 +23,6 @@ android {
         sourceCompatibility("21")
         targetCompatibility("21")
     }
-    kotlinOptions {
-        jvmTarget = "21"
-    }
     val debugSigningConfig = signingConfigs.register("debugSigningConfig") {
         storeFile = file("debug.keystore")
         storePassword = "bigbago"
@@ -38,6 +37,13 @@ android {
     )
 }
 
+kotlin {
+    compilerOptions {
+        jvmTarget = JvmTarget.JVM_21
+        freeCompilerArgs.add("-Xconsistent-data-class-copy-visibility")
+    }
+}
+
 dependencies {
     implementation("androidx.appcompat:appcompat:1.4.1")
     androidTestImplementation("androidx.test:runner:1.4.0")
diff --git a/test_feature/build.gradle.kts b/test_feature/build.gradle.kts
index 99aeb72..8fcfa93 100644
--- a/test_feature/build.gradle.kts
+++ b/test_feature/build.gradle.kts
@@ -1,3 +1,5 @@
+import org.jetbrains.kotlin.gradle.dsl.JvmTarget
+
 plugins {
     id("com.android.dynamic-feature")
     kotlin("android")
@@ -17,8 +19,12 @@ android {
         sourceCompatibility("21")
         targetCompatibility("21")
     }
-    kotlinOptions {
-        jvmTarget = "21"
+}
+
+kotlin {
+    compilerOptions {
+        jvmTarget = JvmTarget.JVM_21
+        freeCompilerArgs.add("-Xconsistent-data-class-copy-visibility")
     }
 }
 
diff --git a/test_library/build.gradle.kts b/test_library/build.gradle.kts
index 49c1358..e8ecb54 100644
--- a/test_library/build.gradle.kts
+++ b/test_library/build.gradle.kts
@@ -1,3 +1,5 @@
+import org.jetbrains.kotlin.gradle.dsl.JvmTarget
+
 plugins {
     id("com.android.library")
     kotlin("android")
@@ -17,9 +19,6 @@ android {
         sourceCompatibility("21")
         targetCompatibility("21")
     }
-    kotlinOptions {
-        jvmTarget = "21"
-    }
     flavorDimensions.add("foo")
     productFlavors {
         register("bar") {
@@ -32,6 +31,13 @@ android {
     }
 }
 
+kotlin {
+    compilerOptions {
+        jvmTarget = JvmTarget.JVM_21
+        freeCompilerArgs.add("-Xconsistent-data-class-copy-visibility")
+    }
+}
+
 dependencies {
     implementation("androidx.appcompat:appcompat:1.4.1")
     androidTestImplementation("androidx.test:runner:1.4.0")