diff --git a/gradle/libraries.toml b/gradle/libraries.toml
index 8f2642f008e..ddcd9c16eb3 100644
--- a/gradle/libraries.toml
+++ b/gradle/libraries.toml
@@ -28,12 +28,12 @@ javaPoet = "1.13.0"
 jetbrains-annotations = "24.0.1"
 junit = "4.13.2"
 kotlin-plugin-min = "1.9.0"
-kotlin-plugin = "2.1.10"
-kotlin-plugin-max = "2.1.10"
+kotlin-plugin = "2.1.20-RC-81"
+kotlin-plugin-max = "2.1.20-RC-81"
 kotlinx-coroutines = "1.9.0"
 kotlinx-datetime = "0.5.0"
 kotlinx-serialization-runtime = "1.6.2"
-ksp = "2.1.10-1.0.29"
+ksp = "2.1.0-1.0.30-SNAPSHOT"
 ktor = "3.0.0"
 moshix = "0.14.1"
 node-fetch = "2.7.0"
diff --git a/gradle/repositories.gradle.kts b/gradle/repositories.gradle.kts
index b43df85be00..77df0b433d4 100644
--- a/gradle/repositories.gradle.kts
+++ b/gradle/repositories.gradle.kts
@@ -1,9 +1,9 @@
 listOf(pluginManagement.repositories, dependencyResolutionManagement.repositories).forEach {
   it.apply {
     // Uncomment this one to use the Kotlin "dev" repository
-    // maven { url = uri("https://maven.pkg.jetbrains.space/kotlin/p/kotlin/dev/") }
+    maven { url = uri("https://maven.pkg.jetbrains.space/kotlin/p/kotlin/dev/") }
     // Uncomment this one to use the Sonatype OSSRH snapshots repository
-    // maven { url = uri("https://oss.sonatype.org/content/repositories/snapshots/") }
+    maven { url = uri("https://oss.sonatype.org/content/repositories/snapshots/") }
 
     mavenCentral()
     exclusiveContent {
diff --git a/intellij-plugin/build.gradle.kts b/intellij-plugin/build.gradle.kts
index 2fc710f0382..3fbf8134fa9 100644
--- a/intellij-plugin/build.gradle.kts
+++ b/intellij-plugin/build.gradle.kts
@@ -6,6 +6,7 @@ import org.jetbrains.intellij.platform.gradle.tasks.VerifyPluginTask.FailureLeve
 import org.jetbrains.intellij.platform.gradle.tasks.VerifyPluginTask.FailureLevel.INTERNAL_API_USAGES
 import org.jetbrains.intellij.platform.gradle.tasks.VerifyPluginTask.FailureLevel.INVALID_PLUGIN
 import org.jetbrains.intellij.platform.gradle.tasks.VerifyPluginTask.FailureLevel.PLUGIN_STRUCTURE_WARNINGS
+import org.jetbrains.kotlin.gradle.plugin.KotlinPlatformType
 import java.net.URI
 import java.text.SimpleDateFormat
 import java.util.Date
@@ -27,9 +28,9 @@ commonSetup()
 // XXX: this should use the settings repositories instead
 repositories {
   // Uncomment this one to use the Kotlin "dev" repository
-  // maven { url = uri("https://maven.pkg.jetbrains.space/kotlin/p/kotlin/dev/") }
+  maven { url = uri("https://maven.pkg.jetbrains.space/kotlin/p/kotlin/dev/") }
   // Uncomment this one to use the Sonatype OSSRH snapshots repository
-  // maven { url = uri("https://oss.sonatype.org/content/repositories/snapshots/") }
+  maven { url = uri("https://oss.sonatype.org/content/repositories/snapshots/") }
   mavenCentral()
 
   intellijPlatform {
@@ -55,6 +56,9 @@ kotlin {
 }
 
 val apolloDependencies = configurations.create("apolloDependencies").apply {
+  attributes {
+    attribute(KotlinPlatformType.attribute, KotlinPlatformType.jvm)
+  }
   listOf(":apollo-annotations", ":apollo-api", ":apollo-runtime").forEach {
     dependencies.add(project.dependencies.project(it, "jvmApiElements"))
   }
diff --git a/libraries/apollo-gradle-plugin/testProjects/gradle-min-version/build.gradle.kts b/libraries/apollo-gradle-plugin/testProjects/gradle-min-version/build.gradle.kts
index ef5d73c340a..af4ab2aa7a4 100644
--- a/libraries/apollo-gradle-plugin/testProjects/gradle-min-version/build.gradle.kts
+++ b/libraries/apollo-gradle-plugin/testProjects/gradle-min-version/build.gradle.kts
@@ -23,7 +23,7 @@ repositories {
   }
   mavenCentral()
   // Uncomment this one to use the Kotlin "dev" repository
-  // maven { url = uri("https://maven.pkg.jetbrains.space/kotlin/p/kotlin/dev/") }
+  maven { url = uri("https://maven.pkg.jetbrains.space/kotlin/p/kotlin/dev/") }
 }
 
 configure<ApolloExtension> {
diff --git a/libraries/apollo-tooling/src/main/kotlin/com/apollographql/apollo/tooling/RegisterOperations.kt b/libraries/apollo-tooling/src/main/kotlin/com/apollographql/apollo/tooling/RegisterOperations.kt
index 895e29e5dd0..8616c4cd104 100644
--- a/libraries/apollo-tooling/src/main/kotlin/com/apollographql/apollo/tooling/RegisterOperations.kt
+++ b/libraries/apollo-tooling/src/main/kotlin/com/apollographql/apollo/tooling/RegisterOperations.kt
@@ -51,7 +51,6 @@ private fun GQLSelection.score(): String {
     is GQLField -> "a$name"
     is GQLFragmentSpread -> "b$name"
     is GQLInlineFragment -> "c" // apollo-tooling doesn't sort inline fragments
-    else -> error("Cannot sort Selection '$this'")
   }
 }
 
diff --git a/libraries/apollo-tooling/src/main/kotlin/com/apollographql/apollo/tooling/serialization.kt b/libraries/apollo-tooling/src/main/kotlin/com/apollographql/apollo/tooling/serialization.kt
index 0e97cf66bbc..7f18038d1dc 100644
--- a/libraries/apollo-tooling/src/main/kotlin/com/apollographql/apollo/tooling/serialization.kt
+++ b/libraries/apollo-tooling/src/main/kotlin/com/apollographql/apollo/tooling/serialization.kt
@@ -21,7 +21,6 @@ internal fun JsonElement.toAny(): Any? = when (this) {
       else -> booleanOrNull ?: intOrNull ?: longOrNull ?: doubleOrNull ?: error("cannot decode $this")
     }
   }
-  else -> error("cannot convert $this to Any")
 }
 
 fun Any?.toJsonElement(): JsonElement = when (this) {
@@ -32,4 +31,4 @@ fun Any?.toJsonElement(): JsonElement = when (this) {
   is String -> JsonPrimitive(this)
   null -> JsonNull
   else -> error("cannot convert $this to JsonElement")
-}
\ No newline at end of file
+}
diff --git a/tests/build.gradle.kts b/tests/build.gradle.kts
index cf85aaad970..15ee601e6a8 100644
--- a/tests/build.gradle.kts
+++ b/tests/build.gradle.kts
@@ -13,4 +13,4 @@ val ciBuild = tasks.register("ciBuild") {
   }
 }
 
-apolloRoot(ciBuild)
\ No newline at end of file
+apolloRoot(ciBuild)