diff --git a/samples/weather-stdio-server/gradle/libs.versions.toml b/samples/weather-stdio-server/gradle/libs.versions.toml
index 430185785..9d609a98a 100644
--- a/samples/weather-stdio-server/gradle/libs.versions.toml
+++ b/samples/weather-stdio-server/gradle/libs.versions.toml
@@ -1,6 +1,6 @@
 [versions]
 coroutines = "1.11.0"
-kotlin = "2.4.10"
+kotlin = "2.4.20"
 ktor = "3.5.2"
 logging = "8.0.4"
 mcp-kotlin = "0.15.0"