diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index ec04aaaa..f9137d9f 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -26,7 +26,7 @@ hanekokoro-framework = "0.4.0"
 jansi = "4.4.7"
 kermit = "2.2.0"
 kotest = "6.2.5"
-kotlin = "2.4.20"
+kotlin = "2.4.21"
 kotlinx-coroutines = "1.11.0"
 kotlinx-datetime = "0.8.0"
 kotlinx-serialization = "1.11.0"