diff --git a/build.gradle.kts b/build.gradle.kts
index d205c1e..2bcc469 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -13,7 +13,7 @@ val kotlinx_collections_immutable_version: String by project
 plugins {
     kotlin("jvm") version "2.0.10"
     id("io.ktor.plugin") version "2.3.12"
-    id("org.jetbrains.kotlin.plugin.serialization") version "2.0.10"
+    id("org.jetbrains.kotlin.plugin.serialization") version "2.0.21"
 }