diff --git a/settings.gradle.kts b/settings.gradle.kts
index 14df3c87..06de1bdb 100644
--- a/settings.gradle.kts
+++ b/settings.gradle.kts
@@ -20,7 +20,7 @@ rootProject.name = "kaml"
 
 pluginManagement {
     plugins {
-        kotlin("multiplatform") version "1.9.20"
-        kotlin("plugin.serialization") version "1.9.20"
+        kotlin("multiplatform") version "1.9.21"
+        kotlin("plugin.serialization") version "1.9.21"
     }
 }