diff --git a/build.gradle.kts b/build.gradle.kts
index 42c6bdee9..3f316981f 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -3,13 +3,14 @@
 import com.diffplug.gradle.spotless.SpotlessExtension
 import com.vanniktech.maven.publish.MavenPublishBaseExtension
 import com.vanniktech.maven.publish.SonatypeHost
-import java.net.URI
 import kotlinx.validation.ApiValidationExtension
 import org.gradle.api.tasks.testing.logging.TestExceptionFormat
 import org.jetbrains.dokka.gradle.DokkaTaskPartial
+import org.jetbrains.kotlin.gradle.dsl.JvmTarget
 import org.jetbrains.kotlin.gradle.dsl.kotlinExtension
 import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
 import ru.vyarus.gradle.plugin.animalsniffer.AnimalSnifferExtension
+import java.net.URI
 
 buildscript {
   dependencies {
@@ -143,8 +144,8 @@ subprojects {
   }
 
   tasks.withType<KotlinCompile> {
-    kotlinOptions {
-      jvmTarget = JavaVersion.VERSION_1_8.toString()
+    compilerOptions {
+      jvmTarget.set(JvmTarget.JVM_1_8)
       freeCompilerArgs = listOf(
         "-Xjvm-default=all",
       )
diff --git a/buildSrc/build.gradle.kts b/buildSrc/build.gradle.kts
index e30c56b5d..90a3bde87 100644
--- a/buildSrc/build.gradle.kts
+++ b/buildSrc/build.gradle.kts
@@ -23,5 +23,9 @@ repositories {
 }
 
 dependencies {
-  implementation("biz.aQute.bnd:biz.aQute.bnd.gradle:6.4.0")
+  // TODO (https://github.com/square/okhttp/issues/8612) we will need a consistent version
+  // 7.1.0 is used because it avoids this error
+  // Could not create an instance of type aQute.bnd.gradle.BundleTaskExtension.
+  // Cannot change attributes of configuration ':native-image-tests:compileClasspath' after it has been locked for mutation
+  implementation("biz.aQute.bnd:biz.aQute.bnd.gradle:7.1.0")
 }
diff --git a/gradle.properties b/gradle.properties
index d963d6a5a..c7af0b38d 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,13 +1,11 @@
 org.gradle.caching=true
-org.gradle.jvmargs='-Dfile.encoding=UTF-8'
 org.gradle.parallel=true
-android.enableJetifier=true
+
 android.useAndroidX=true
-kotlin.mpp.stability.nowarn=true
-kotlin.js.compiler=ir
-kotlin.incremental.js.ir=true
+
 androidBuild=false
 graalBuild=false
 loomBuild=false
 containerTests=false
-android.experimental.lint.version=8.2.0
+
+org.gradle.jvmargs='-Dfile.encoding=UTF-8'
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index f4b21b528..8f30028e5 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -1,17 +1,18 @@
 [versions]
+# 7.0.0 is JDK 17+ https://github.com/bndtools/bnd/wiki/Changes-in-7.0.0
 biz-aQute-bnd = "6.4.0"
 checkStyle = "10.20.2"
 com-squareup-moshi = "1.15.1"
 com-squareup-okio = "3.9.1"
 de-mannodermaus-junit5 = "1.6.0"
 graalvm = "22.3.2"
-kotlinx-serialization = "1.6.3"
-ksp = "1.9.24-1.0.20"
+kotlinx-serialization = "1.7.3"
+ksp = "2.1.0-1.0.29"
 mockserverClient = "5.15.0"
 org-bouncycastle = "1.76"
 org-conscrypt = "2.5.2"
-org-jetbrains-coroutines = "1.8.1"
-org-jetbrains-kotlin = "1.9.25"
+org-jetbrains-coroutines = "1.9.0"
+org-jetbrains-kotlin = "2.1.0"
 org-junit-jupiter = "5.11.3"
 retrofit = "2.11.0"
 testcontainers = "1.20.4"
@@ -38,7 +39,7 @@ conscrypt-openjdk = { module = "org.conscrypt:conscrypt-openjdk-uber", version.r
 converter-moshi = { module = "com.squareup.retrofit2:converter-moshi", version.ref = "retrofit" }
 eclipseOsgi = "org.eclipse.platform:org.eclipse.osgi:3.21.0"
 findbugs-jsr305 = "com.google.code.findbugs:jsr305:3.0.2"
-gradlePlugin-android = "com.android.tools.build:gradle:8.2.0"
+gradlePlugin-android = "com.android.tools.build:gradle:8.7.3"
 gradlePlugin-androidJunit5 = "de.mannodermaus.gradle.plugins:android-junit5:1.11.2.0"
 gradlePlugin-animalsniffer = "ru.vyarus:gradle-animalsniffer-plugin:1.7.2"
 gradlePlugin-binaryCompatibilityValidator = "org.jetbrains.kotlinx.binary-compatibility-validator:org.jetbrains.kotlinx.binary-compatibility-validator.gradle.plugin:0.16.3"
@@ -87,14 +88,14 @@ openjsse = "org.openjsse:openjsse:1.1.14"
 playservices-safetynet = "com.google.android.gms:play-services-safetynet:18.1.0"
 retrofit = { module = "com.squareup.retrofit2:retrofit", version.ref = "retrofit" }
 robolectric-android = "org.robolectric:android-all:14-robolectric-10818077"
-robolectric = "org.robolectric:robolectric:4.12.2"
+robolectric = "org.robolectric:robolectric:4.14.1"
 signature-android-apilevel21 = "net.sf.androidscents.signature:android-api-level-21:5.0.1_r2"
 signature-android-apilevel24 = "net.sf.androidscents.signature:android-api-level-24:7.0_r2"
 squareup-moshi = { module = "com.squareup.moshi:moshi", version.ref = "com-squareup-moshi" }
 squareup-moshi-compiler = { module = "com.squareup.moshi:moshi-kotlin-codegen", version.ref = "com-squareup-moshi" }
 squareup-moshi-kotlin = { module = "com.squareup.moshi:moshi-kotlin", version.ref = "com-squareup-moshi" }
 squareup-okhttp-icu = "com.squareup.okhttpicu:okhttp-icu:0.2.0"
-squareup-kotlinPoet = "com.squareup:kotlinpoet:1.17.0"
+squareup-kotlinPoet = "com.squareup:kotlinpoet:1.18.1"
 squareup-okio = { module = "com.squareup.okio:okio", version.ref = "com-squareup-okio" }
 squareup-okio-fakefilesystem = { module = "com.squareup.okio:okio-fakefilesystem", version.ref = "com-squareup-okio" }
 squareup-okio-nodefilesystem = { module = "com.squareup.okio:okio-nodefilesystem", version.ref = "com-squareup-okio" }
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index e6aba2515..c1d5e0185 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-8.5-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.11.1-all.zip
 networkTimeout=10000
 validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME
diff --git a/okcurl/build.gradle.kts b/okcurl/build.gradle.kts
index 77734c77c..868ee0ee0 100644
--- a/okcurl/build.gradle.kts
+++ b/okcurl/build.gradle.kts
@@ -12,7 +12,7 @@ plugins {
 
 val copyResourcesTemplates = tasks.register<Copy>("copyResourcesTemplates") {
   from("src/main/resources-templates")
-  into("$buildDir/generated/resources-templates")
+  into(layout.buildDirectory.dir("generated/resources-templates"))
   expand("projectVersion" to "${project.version}")
   filteringCharset = Charsets.UTF_8.toString()
 }
diff --git a/okhttp-coroutines/src/test/kotlin/okhttp3/coroutines/ExecuteAsyncTest.kt b/okhttp-coroutines/src/test/kotlin/okhttp3/coroutines/ExecuteAsyncTest.kt
index 6f436ba0b..1a4d252ec 100644
--- a/okhttp-coroutines/src/test/kotlin/okhttp3/coroutines/ExecuteAsyncTest.kt
+++ b/okhttp-coroutines/src/test/kotlin/okhttp3/coroutines/ExecuteAsyncTest.kt
@@ -14,6 +14,8 @@
  * limitations under the License.
  *
  */
+@file:OptIn(ExperimentalCoroutinesApi::class)
+
 package okhttp3.coroutines
 
 import assertk.assertThat
@@ -25,6 +27,7 @@ import kotlin.test.assertFailsWith
 import kotlin.time.Duration.Companion.seconds
 import kotlinx.coroutines.CancellationException
 import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.ExperimentalCoroutinesApi
 import kotlinx.coroutines.TimeoutCancellationException
 import kotlinx.coroutines.coroutineScope
 import kotlinx.coroutines.job
diff --git a/okhttp/build.gradle.kts b/okhttp/build.gradle.kts
index 084db6e64..60a7aa6cf 100644
--- a/okhttp/build.gradle.kts
+++ b/okhttp/build.gradle.kts
@@ -19,7 +19,7 @@ fun ByteArray.toByteStringExpression(): String {
 
 val copyKotlinTemplates = tasks.register<Copy>("copyKotlinTemplates") {
   from("src/main/kotlinTemplates")
-  into("$buildDir/generated/sources/kotlinTemplates")
+  into(layout.buildDirectory.dir("generated/sources/kotlinTemplates"))
 
   // Tag as an input to regenerate after an update
   inputs.file("src/test/resources/okhttp3/internal/publicsuffix/PublicSuffixDatabase.gz")
@@ -44,9 +44,9 @@ dependencies {
   generateIdnaMappingTableConfiguration(projects.okhttpIdnaMappingTable)
 }
 val generateIdnaMappingTable by tasks.creating(JavaExec::class.java) {
-  outputs.dir("$buildDir/generated/sources/idnaMappingTable")
+  outputs.dir(layout.buildDirectory.dir("generated/sources/idnaMappingTable"))
   mainClass.set("okhttp3.internal.idn.GenerateIdnaMappingTableCode")
-  args("$buildDir/generated/sources/idnaMappingTable")
+  args(layout.buildDirectory.dir("generated/sources/idnaMappingTable").get())
   classpath = generateIdnaMappingTableConfiguration
 }
 
@@ -109,7 +109,7 @@ val osgiTestDeploy: Configuration by configurations.creating
 
 val copyOsgiTestDeployment by tasks.creating(Copy::class.java) {
   from(osgiTestDeploy)
-  into("$buildDir/resources/test/okhttp3/osgi/deployments")
+  into(layout.buildDirectory.dir("resources/test/okhttp3/osgi/deployments"))
 }
 tasks.getByName("test") {
   dependsOn(copyOsgiTestDeployment)