diff --git a/gradle/compile/java.gradle b/gradle/compile/java.gradle
index 8d7f2e5..610ba23 100644
--- a/gradle/compile/java.gradle
+++ b/gradle/compile/java.gradle
@@ -28,6 +28,7 @@ tasks.withType(JavaCompile) {
 
 tasks.withType(Javadoc) {
     options.addStringOption('Xdoclint:none', '-quiet')
+    options.encoding = 'UTF-8'
 }
 
 task sourcesJar(type: Jar, dependsOn: classes) {