diff --git a/build.gradle b/build.gradle
index 7c674b63..28e103b9 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,9 +1,9 @@
 buildscript {
-    ext.kotlin_version = "1.2.20"
+    ext.kotlin_version = "1.2.21"
 }
 
 plugins {
-    id "org.jetbrains.kotlin.jvm" version "1.2.20" apply false
+    id "org.jetbrains.kotlin.jvm" version "1.2.21" apply false
 }
 
 allprojects{