diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index 8a7058ab..ea2f18f5 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -1,5 +1,5 @@
 [versions]
-kotlin = "2.1.20"
+kotlin = "2.1.21"
 dokka = "2.0.0"
 openapi-generator = "7.12.0"
 jupyter-api = "0.12.0-398"