diff --git a/build.gradle.kts b/build.gradle.kts
index 1524cc6..36a89b8 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -2,7 +2,7 @@ import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
 
 plugins {
     // Apply the Kotlin JVM plugin to add support for Kotlin.
-    id("org.jetbrains.kotlin.jvm") version "1.6.10"
+    id("org.jetbrains.kotlin.jvm") version "1.9.21"
     kotlin("plugin.serialization") version "1.6.10"
     id("com.github.johnrengelman.shadow") version "7.0.0"
     `maven-publish`