diff --git a/build.gradle.kts b/build.gradle.kts
index 0c7a9e3..e4e0d78 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -5,7 +5,7 @@ import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
 plugins {
     id("org.springframework.boot") version "4.0.5"
     id("io.spring.dependency-management") version "1.1.7"
-    val kotlinVersion = "2.3.20"
+    val kotlinVersion = "2.3.21"
     kotlin("jvm") version kotlinVersion
     kotlin("plugin.spring") version kotlinVersion
     id("org.openapi.generator") version "7.21.0"