diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index 941b43aa..66817722 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -4,7 +4,7 @@ processor = "2026.3b-SNAPSHOT"
 parser = "2026.2"
 api = "2024.2"
 
-kotlin = "2.3.20"
+kotlin = "2.3.21"
 build-jdk = "17"
 test-jdk = "17"
 build-plugins = "2026.3"