diff --git a/build.gradle b/build.gradle
index fd6d4d6..2072b97 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 = '2.3.20'
+        kotlin_version = '2.3.21'
         retrofit_version = '3.0.0'
     }
     repositories {