diff --git a/packages/backend/src/models/datastore.js b/packages/backend/src/models/datastore.js
index 91f80d29..015bb824 100644
--- a/packages/backend/src/models/datastore.js
+++ b/packages/backend/src/models/datastore.js
@@ -10,7 +10,7 @@ class Datastore extends Base {
     properties: {
       id: { type: 'string', format: 'uuid' },
       key: { type: 'string', minLength: 1 },
-      value: { type: 'string', minLength: 1 },
+      value: { type: 'string' },
       scope: {
         type: 'string',
         enum: ['flow'],