diff --git a/build.gradle b/build.gradle
index d8927ebcb..4426d7d58 100644
--- a/build.gradle
+++ b/build.gradle
@@ -65,6 +65,7 @@ codeCoverageReport.dependsOn test
 
 compileJava.options.encoding = "UTF-8"
 compileTestJava.options.encoding = "UTF-8"
+javadoc.options.encoding = "UTF-8"
 
 java {
     withJavadocJar()