diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index 33af12b..b49b91d 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -1,5 +1,5 @@
 [versions]
-kotlin = "1.8.10"
+kotlin = "1.9.21"
 tuprolog = "0.31.1"
 
 [plugins]