diff --git a/tutorials/kotlin/Polygons/build.gradle.kts b/tutorials/kotlin/Polygons/build.gradle.kts
index 89e123657..745ead0c0 100644
--- a/tutorials/kotlin/Polygons/build.gradle.kts
+++ b/tutorials/kotlin/Polygons/build.gradle.kts
@@ -17,7 +17,7 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 
 buildscript {
-    val kotlinVersion = "2.0.0"
+    val kotlinVersion = "2.0.21"
     repositories {
         mavenCentral()
         google()