diff --git a/buildSrc/src/main/groovy/archunit.java-conventions.gradle b/buildSrc/src/main/groovy/archunit.java-conventions.gradle
index 2df21f6a4..941691f22 100644
--- a/buildSrc/src/main/groovy/archunit.java-conventions.gradle
+++ b/buildSrc/src/main/groovy/archunit.java-conventions.gradle
@@ -15,4 +15,5 @@ tasks.withType(JavaCompile) { Task task ->
 
 javadoc {
     options.addBooleanOption('html5', true)
+    options.encoding = UTF_8.toString()
 }
\ No newline at end of file