diff --git a/buildSrc/build.gradle.kts b/buildSrc/build.gradle.kts
index ae5ef3fa7..b8ba6878b 100644
--- a/buildSrc/build.gradle.kts
+++ b/buildSrc/build.gradle.kts
@@ -1,7 +1,7 @@
 plugins {
     `kotlin-dsl`
     kotlin("jvm") version "1.9.20"
-    id("com.vanniktech.maven.publish") version "0.28.0"
+    id("com.vanniktech.maven.publish") version "0.34.0"
 }
 
 repositories {
@@ -11,7 +11,7 @@ repositories {
 
 dependencies {
     implementation("org.jetbrains.kotlin:kotlin-gradle-plugin:1.9.20")
-    implementation("com.vanniktech:gradle-maven-publish-plugin:0.28.0")
+    implementation("com.vanniktech:gradle-maven-publish-plugin:0.34.0")
 
     testImplementation(kotlin("test"))
     testImplementation("org.junit.jupiter:junit-jupiter:6.1.3")
diff --git a/buildSrc/src/main/kotlin/openai.publish.gradle.kts b/buildSrc/src/main/kotlin/openai.publish.gradle.kts
index c645c2ed9..036274115 100644
--- a/buildSrc/src/main/kotlin/openai.publish.gradle.kts
+++ b/buildSrc/src/main/kotlin/openai.publish.gradle.kts
@@ -1,7 +1,7 @@
 import com.vanniktech.maven.publish.JavadocJar
 import com.vanniktech.maven.publish.KotlinJvm
 import com.vanniktech.maven.publish.MavenPublishBaseExtension
-import com.vanniktech.maven.publish.SonatypeHost
+import org.gradle.plugins.signing.SigningExtension
 
 plugins {
     id("com.vanniktech.maven.publish")
@@ -23,14 +23,17 @@ repositories {
     mavenCentral()
 }
 
-extra["signingInMemoryKey"] = System.getenv("GPG_SIGNING_KEY")
-extra["signingInMemoryKeyId"] = System.getenv("GPG_SIGNING_KEY_ID")
-extra["signingInMemoryKeyPassword"] = System.getenv("GPG_SIGNING_PASSWORD")
-
 configure<MavenPublishBaseExtension> {
     if (!project.hasProperty("publishLocal")) {
         signAllPublications()
-        publishToMavenCentral(SonatypeHost.CENTRAL_PORTAL)
+        configure<SigningExtension> {
+            useInMemoryPgpKeys(
+                System.getenv("GPG_SIGNING_KEY_ID"),
+                System.getenv("GPG_SIGNING_KEY"),
+                System.getenv("GPG_SIGNING_PASSWORD"),
+            )
+        }
+        publishToMavenCentral()
     }
 
     coordinates(project.group.toString(), project.name, project.version.toString())
@@ -67,6 +70,13 @@ configure<MavenPublishBaseExtension> {
     }
 }
 
+// Preserve Kotlin source paths when Maven Publish uses Gradle's Java sources task.
+tasks.named<Jar>("sourcesJar") {
+    filesMatching("**/*.kt") {
+        path = "main/$path"
+    }
+}
+
 tasks.withType<Zip>().configureEach {
     isZip64 = true
 }
diff --git a/openai-java-core/build.gradle.kts b/openai-java-core/build.gradle.kts
index bfd85f640..f2d05d30f 100644
--- a/openai-java-core/build.gradle.kts
+++ b/openai-java-core/build.gradle.kts
@@ -1,4 +1,3 @@
-import com.openai.gradle.CoreCompilationClaimedSourceIncludeSpec
 import com.openai.gradle.CoreCompilationClaimedSourceSpec
 import com.openai.gradle.CoreCompilationDependencies
 import com.openai.gradle.CoreCompilationShards
@@ -86,15 +85,8 @@ val coreJar = tasks.named<Jar>("jar") {
     duplicatesStrategy = DuplicatesStrategy.FAIL
 }
 
-val coreSourcesJar = tasks.named<Jar>("kotlinSourcesJar") {
+val coreSourcesJar = tasks.named<Jar>("sourcesJar") {
     duplicatesStrategy = DuplicatesStrategy.FAIL
-    from(
-        fileTree("src/main/kotlin").matching {
-            include(CoreCompilationClaimedSourceIncludeSpec())
-        }
-    ) {
-        into("main")
-    }
 }
 
 val verifyCoreCompilationArtifact =