diff --git a/build.gradle b/build.gradle
index 67bc674f..1072bacb 100644
--- a/build.gradle
+++ b/build.gradle
@@ -9,7 +9,7 @@ buildscript {
     ext.guavaVersion = '32.1.1-jre'
     ext.junitVersion = '5.10.0'
     ext.kotestVersion = '5.6.2'
-    ext.kotlinVersion = "1.9.10"
+    ext.kotlinVersion = "1.9.21"
     ext.mockkVersion = "1.13.7"
 
     repositories {