diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index 8dadbbb..0602cef 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -2,7 +2,7 @@
 # build tools
 java = "17"
 jacoco = "0.8.8"
-kotlin = "1.9.20"
+kotlin = "1.9.21"
 
 [libraries]
 # build tools