diff --git a/settings.gradle.kts b/settings.gradle.kts
index a461b7e..34e8233 100644
--- a/settings.gradle.kts
+++ b/settings.gradle.kts
@@ -1,8 +1,8 @@
 pluginManagement {
 	plugins {
 		// Update this in libs.version.toml when you change it here.
-		kotlin("jvm") version "2.1.0"
-		kotlin("plugin.serialization") version "2.1.0"
+		kotlin("jvm") version "2.1.21"
+		kotlin("plugin.serialization") version "2.1.21"
 
 		id("com.github.johnrengelman.shadow") version "8.1.1"