diff --git a/build.gradle b/build.gradle
index 0fcb4d5..b91e7c7 100644
--- a/build.gradle
+++ b/build.gradle
@@ -5,7 +5,7 @@ buildscript {
         version_code = 1
         version_name = '1.0.0'
 
-        kotlin_version = '1.3.61'
+        kotlin_version = '1.5.21'
         appcompat_version = '1.1.0'
 
         gradle_version = '3.5.3'