diff --git a/build.gradle.kts b/build.gradle.kts
index 8006712..fba360f 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -1,6 +1,6 @@
 plugins {
     kotlin("multiplatform") version "1.7.20" apply false
-    kotlin("plugin.serialization") version "1.7.20" apply false
+    kotlin("plugin.serialization") version "1.7.21" apply false
     `maven-publish`
     signing
     id("io.github.gradle-nexus.publish-plugin") version "1.1.0"