diff --git a/build.gradle.kts b/build.gradle.kts
index df61287..4dcb2dd 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -1,6 +1,6 @@
 plugins {
     kotlin("jvm") version "2.0.20"
-    kotlin("plugin.serialization") version "2.0.20"
+    kotlin("plugin.serialization") version "2.0.21"
     id("org.jlleitschuh.gradle.ktlint").version("11.6.1")
 }