diff --git a/samples/kotlin-mcp-client/gradle/libs.versions.toml b/samples/kotlin-mcp-client/gradle/libs.versions.toml
index 2a819cf4..19ffc21e 100644
--- a/samples/kotlin-mcp-client/gradle/libs.versions.toml
+++ b/samples/kotlin-mcp-client/gradle/libs.versions.toml
@@ -1,6 +1,6 @@
 [versions]
 anthropic = "2.18.0"
-kotlin = "2.2.21"
+kotlin = "2.3.20"
 ktor = "3.2.3"
 mcp-kotlin = "0.9.0"
 shadow = "9.4.0"