diff --git a/kotlin-extension/build.gradle.kts b/kotlin-extension/build.gradle.kts
index 5f651b23c..c663a0556 100644
--- a/kotlin-extension/build.gradle.kts
+++ b/kotlin-extension/build.gradle.kts
@@ -1,5 +1,5 @@
 plugins {
-    id ("org.jetbrains.kotlin.jvm") version "2.1.20"
+    id ("org.jetbrains.kotlin.jvm") version "2.1.21"
 }
 
 description = "OpenTelemetry Example for Kotlin extensions"