diff --git a/samples/kotlin-mcp-server/gradle/libs.versions.toml b/samples/kotlin-mcp-server/gradle/libs.versions.toml
index 3a03aed..a6c07dc 100644
--- a/samples/kotlin-mcp-server/gradle/libs.versions.toml
+++ b/samples/kotlin-mcp-server/gradle/libs.versions.toml
@@ -1,5 +1,5 @@
 [versions]
-kotlin = "2.2.21"
+kotlin = "2.3.21"
 ktor = "3.3.3"
 mcp-kotlin = "0.11.1"
 slf4j = "2.0.17"