diff --git a/build.gradle b/build.gradle
index 3014d1e..f4a478c 100644
--- a/build.gradle
+++ b/build.gradle
@@ -39,6 +39,7 @@ sourceSets {
     main {
         java {
             srcDirs = ['src/']
+            include '**/*.java', '**/*.kt'
         }
         resources {
             srcDirs = ['src/']