diff --git a/build.gradle b/build.gradle
index 3b2f24d..97b3455 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,5 +1,5 @@
 buildscript {
-    ext.kotlin_version = '1.1.61'
+    ext.kotlin_version = '1.2.21'
     repositories {
         mavenCentral()
     }