diff --git a/app/imports/api/properties/Containers.js b/app/imports/api/properties/Containers.js
index d02cc841..45f1ecef 100644
--- a/app/imports/api/properties/Containers.js
+++ b/app/imports/api/properties/Containers.js
@@ -18,12 +18,12 @@ let ContainerSchema = new SimpleSchema({
 	weight: {
 		type: Number,
 		min: 0,
-		defaultValue: 0
+    optional: true,
 	},
 	value: {
 		type: Number,
 		min: 0,
-		defaultValue: 0
+    optional: true,
 	},
 	description: {
 		type: String,