diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index 0ec4f3a..905d83e 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -6,7 +6,7 @@ opentest4j = "1.3.0"
 # plugins
 changelog = "2.5.0"
 intelliJPlatform = "2.15.0"
-kotlin = "2.3.0"
+kotlin = "2.3.21"
 kover = "0.9.8"
 qodana = "2026.1.0"