diff --git a/build.gradle b/build.gradle
index 4e5c3f2..94f7d34 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,6 +1,6 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 buildscript {
-    ext.kotlin_version = "1.7.20"
+    ext.kotlin_version = "1.9.21"
     repositories {
         google()
         mavenCentral()