diff --git a/build.gradle.kts b/build.gradle.kts
index 2835074..f5a7a8f 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -4,7 +4,7 @@ import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
 plugins {
     application // Provide convenience executables for trying out the examples.
     jacoco
-    kotlin("jvm") version "1.7.21"
+    kotlin("jvm") version "1.9.21"
     id("idea")
     id("org.gradle.crypto.checksum") version "1.4.0"
     id("org.jlleitschuh.gradle.ktlint") version "11.3.1"