diff --git a/build.gradle.kts b/build.gradle.kts
index a8589c3bf5b..8a1b2feaf4f 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -11,7 +11,7 @@ plugins {
     id("org.sonarqube") version "3.5.0.2730"
     id("io.freefair.lombok") version "6.5.1"
     id("io.freefair.javadoc-links") version "6.5.1"
-    id("io.freefair.javadoc-utf-8") version "6.5.1"
+    id("io.freefair.javadoc-utf-8") version "6.6"
     id("io.freefair.aspectj.post-compile-weaving") version "6.5.1"
     id("io.freefair.maven-central.validate-poms") version "6.5.1"
     id("me.qoomon.git-versioning") version "6.3.6"