diff --git a/lib/factory.js b/lib/factory.js
index 9bc3dfec4..9b053608d 100644
--- a/lib/factory.js
+++ b/lib/factory.js
@@ -13,7 +13,7 @@ const dockerCompose = class ComposeService {
   constructor(id, info = {}, ...sources) {
     this.id = id;
     this.info = info;
-    this.data = _(sources).map(source => _.merge({}, source, {version: '3.6'})).value();
+    this.data = _(sources).map(source => _.merge({}, source, {})).value();
   };
 };