diff --git a/build.gradle.kts b/build.gradle.kts
index 439614c..ec4e9ed 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -12,7 +12,7 @@ buildscript {
 }
 
 plugins {
-    kotlin("multiplatform") version "1.8.22"
+    kotlin("multiplatform") version "1.9.21"
     id("org.jetbrains.dokka") version "1.9.10"
     val tutteliGradleVersion = "4.11.0"
     id("ch.tutteli.gradle.plugins.dokka") version tutteliGradleVersion