diff --git a/build.gradle b/build.gradle
index f420700..6b46cd0 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,5 +1,5 @@
 buildscript {
-    ext.kotlin_version = '1.3.20'
+    ext.kotlin_version = '1.3.21'
     repositories {
         jcenter()
         mavenCentral()