diff --git a/build.gradle.kts b/build.gradle.kts
index 6026bc10..77d199b3 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -9,7 +9,7 @@ val mockWebServerVersion = "4.12.0"
 val jacksonVersion = "2.15.3"
 val nettyVersion = "4.1.100.Final"
 val junitJupiterVersion = "5.10.0"
-val kotlinVersion = "1.9.10"
+val kotlinVersion = "1.9.20"
 val freemarkerVersion = "2.3.32"
 val kotestVersion = "5.7.2"
 val bouncyCastleVersion = "1.70"