diff --git a/build.gradle.kts b/build.gradle.kts
index e8d5bb2..c3d24d6 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -4,7 +4,7 @@ import groovy.lang.Closure
 import org.gradle.jvm.toolchain.internal.CurrentJvmToolchainSpec
 
 plugins {
-    kotlin("jvm") version "1.9.22"
+    kotlin("jvm") version "2.0.21"
     id("com.github.johnrengelman.shadow") version "7.1.0"
     id("com.palantir.git-version") version "0.12.3"
     id("io.github.gradle-nexus.publish-plugin") version "1.1.0"
diff --git a/semanticdb-kotlinc/build.gradle.kts b/semanticdb-kotlinc/build.gradle.kts
index bae3a63..ea5f3d0 100644
--- a/semanticdb-kotlinc/build.gradle.kts
+++ b/semanticdb-kotlinc/build.gradle.kts
@@ -43,13 +43,13 @@ dependencies {
     testImplementation("dev.zacsweers.kctfork", "core", "0.4.0")
 
     testImplementation("org.junit.jupiter", "junit-jupiter-params", "5.8.1")
-    testImplementation("org.jetbrains.kotlin", "kotlin-stdlib-jdk8", "1.5.0") {
+    testImplementation("org.jetbrains.kotlin", "kotlin-stdlib-jdk8", "2.0.21") {
         version {
             strictly("1.5.0")
         }
     }.because("transitive dependencies introduce 1.4.31 to the classpath which conflicts, can't use testRuntimeOnly")
     testImplementation(kotlin("reflect"))
-    testImplementation(kotlin("script-runtime", "1.5.0"))
+    testImplementation(kotlin("script-runtime", "2.0.21"))
 
     snapshotsImplementation("com.sourcegraph", "scip-java_2.13", "0.8.24")
 }