diff --git a/build.gradle b/build.gradle
index 6e999b9..40dc156 100644
--- a/build.gradle
+++ b/build.gradle
@@ -88,4 +88,5 @@ test {
 
 task javadocs(type: Javadoc) {
     source = sourceSets.main.allJava
+    classpath = sourceSets.main.runtimeClasspath
 }