diff --git a/build.gradle b/build.gradle
index 394f0be..56af2fa 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,7 +1,7 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 
 buildscript {
-    ext.kotlin_version = '1.3.61'
+    ext.kotlin_version = '1.5.21'
     apply from: 'dependency.gradle'
 
     repositories {