diff --git a/build.gradle b/build.gradle
index 758874306f847231c9ea75f39bb660a8bcece851..ce8198df80bd051707b033987a15463d16088839 100644
--- a/build.gradle
+++ b/build.gradle
@@ -110,10 +110,10 @@ run {
 // Delombok Task
 task delombok(type: DelombokTask, dependsOn: compileJava) {
     ext.outputDir = file("$buildDir/delombok")
-    outputs.dir(outputDir)
+    outputs.dir(ext.outputDir)
     sourceSets.main.java.srcDirs.each {
         inputs.dir(it)
-        args(it, "-d", outputDir)
+        args(it, "-d", ext.outputDir)
     }
 }
 
diff --git a/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar
index f6b961fd5a86aa5fbfe90f707c3138408be7c718..91ca28c8b802289c3a438766657a5e98f20eff03 100644
Binary files a/gradle/wrapper/gradle-wrapper.jar and b/gradle/wrapper/gradle-wrapper.jar differ