diff --git a/build.yaml b/build.yaml
new file mode 100644
index 0000000..e3aacad
--- /dev/null
+++ b/build.yaml
@@ -0,0 +1,7 @@
+targets:
+  $default:
+    builders:
+      json_serializable:
+        options:
+          create_to_json: false
+          include_if_null: true
\ No newline at end of file