diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index 1c4e145f..571df0b3 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -1,4 +1,5 @@
 [versions]
+kotlin = "2.1.21"
 managed-assertj = "3.27.4"
 managed-hamcrest = "3.0"
 managed-mockito = "5.20.0"