diff --git a/build.gradle b/build.gradle
index 0cbe343..1d51456 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 = "1.4.0"
+    ext.kotlin_version = "1.4.21-2"
     repositories {
         google()
         jcenter()