diff --git a/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar
index 1b33c55..8bdaf60 100644
Binary files a/gradle/wrapper/gradle-wrapper.jar and b/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index d4081da..2a84e18 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-8.14.3-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-9.0.0-bin.zip
 networkTimeout=10000
 validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME
diff --git a/gradlew b/gradlew
index 23d15a9..ef07e01 100755
--- a/gradlew
+++ b/gradlew
@@ -1,7 +1,7 @@
 #!/bin/sh
 
 #
-# Copyright © 2015-2021 the original authors.
+# Copyright © 2015 the original authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/moshi-kotlin-tests/build.gradle.kts b/moshi-kotlin-tests/build.gradle.kts
index ff018c2..43bee96 100644
--- a/moshi-kotlin-tests/build.gradle.kts
+++ b/moshi-kotlin-tests/build.gradle.kts
@@ -1,5 +1,5 @@
-import Build_gradle.TestMode.KSP
-import Build_gradle.TestMode.REFLECT
+import TestMode.KSP
+import TestMode.REFLECT
 import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
 
 plugins {
diff --git a/moshi-kotlin-tests/codegen-only/build.gradle.kts b/moshi-kotlin-tests/codegen-only/build.gradle.kts
index 3cb8c70..76c9a15 100644
--- a/moshi-kotlin-tests/codegen-only/build.gradle.kts
+++ b/moshi-kotlin-tests/codegen-only/build.gradle.kts
@@ -1,5 +1,5 @@
-import Build_gradle.TestMode.KSP
-import Build_gradle.TestMode.REFLECT
+import TestMode.KSP
+import TestMode.REFLECT
 import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
 
 plugins {