diff --git a/build.gradle b/build.gradle
index 6f2bfab..2f7a748 100644
--- a/build.gradle
+++ b/build.gradle
@@ -6,7 +6,7 @@ buildscript {
         maven { url 'https://plugins.gradle.org/m2/' }
     }
     dependencies {
-        classpath 'net.ltgt.gradle:gradle-apt-plugin:0.15'
+        classpath 'net.ltgt.gradle:gradle-apt-plugin:0.21'
         classpath 'se.transmode.gradle:gradle-docker:1.2'
     }
 }