diff --git a/samples/simple-streamable-server/gradle/libs.versions.toml b/samples/simple-streamable-server/gradle/libs.versions.toml
index 0dc3cd8e3..0d5840060 100644
--- a/samples/simple-streamable-server/gradle/libs.versions.toml
+++ b/samples/simple-streamable-server/gradle/libs.versions.toml
@@ -1,5 +1,5 @@
 [versions]
-kotlin = "2.4.20"
+kotlin = "2.4.21"
 ktor = "3.6.0"
 junit = "6.1.3"
 mcp-kotlin = "0.15.0"