diff --git a/api/build.gradle.kts b/api/build.gradle.kts
index a85e06d8..b788be42 100644
--- a/api/build.gradle.kts
+++ b/api/build.gradle.kts
@@ -5,7 +5,7 @@ val logback_version: String by project
 plugins {
     application
     kotlin("jvm") version "1.8.10"
-    id("org.jetbrains.kotlin.plugin.serialization") version "1.8.10"
+    id("org.jetbrains.kotlin.plugin.serialization") version "1.8.21"
 }
 
 repositories {