diff --git a/devtools/gradle/gradle/libs.versions.toml b/devtools/gradle/gradle/libs.versions.toml
index 9902875d78e44..5bb10bc0b84fc 100644
--- a/devtools/gradle/gradle/libs.versions.toml
+++ b/devtools/gradle/gradle/libs.versions.toml
@@ -2,7 +2,7 @@
 plugin-publish = "1.2.1"
 
 # updating Kotlin here makes QuarkusPluginTest > shouldNotFailOnProjectDependenciesWithoutMain(Path) fail
-kotlin = "1.9.20"
+kotlin = "1.9.21"
 smallrye-config = "3.4.4"
 
 junit5 = "5.10.1"