diff --git a/fireplace-app/build.gradle.kts b/fireplace-app/build.gradle.kts
index e42b865e..e0776931 100644
--- a/fireplace-app/build.gradle.kts
+++ b/fireplace-app/build.gradle.kts
@@ -15,7 +15,7 @@ description = "Swing app that uses fireplace-swing"
 plugins {
     id("application")
     id("com.github.johnrengelman.shadow") version "8.1.1"
-    kotlin("jvm") version "1.9.20"
+    kotlin("jvm") version "1.9.21"
 }
 
 repositories {