diff --git a/build.gradle.kts b/build.gradle.kts
index b93712c45..19c3b4dda 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -4,7 +4,7 @@ import io.bkbn.sourdough.gradle.library.jvm.LibraryJvmExtension
 
 plugins {
   kotlin("jvm") version "2.1.20" apply false
-  kotlin("plugin.serialization") version "2.1.20" apply false
+  kotlin("plugin.serialization") version "2.1.21" apply false
   id("io.bkbn.sourdough.library.jvm") version "0.13.1" apply false
   id("io.bkbn.sourdough.application.jvm") version "0.13.1" apply false
   id("com.vanniktech.maven.publish") version "0.31.0" apply false