diff --git a/build.gradle b/build.gradle
index 6f2bfab..f032e90 100644
--- a/build.gradle
+++ b/build.gradle
@@ -15,7 +15,7 @@ plugins {
     id 'java'
     id 'application'
     id 'idea'
-    id 'net.ltgt.apt' version '0.15'
+    id 'net.ltgt.apt' version '0.21'
     id 'com.github.johnrengelman.shadow' version '2.0.0'
 }