diff --git a/build.gradle b/build.gradle
index 98878b5..0983c50 100644
--- a/build.gradle
+++ b/build.gradle
@@ -23,6 +23,11 @@ repositories {
     jcenter()
 }
 
+javadoc {
+    source = sourceSets.main.allJava
+    classpath = configurations.compile
+}
+
 sourceCompatibility = 1.8
 targetCompatibility = 1.8