diff --git a/basic/server/database/datamodel.graphql b/basic/server/database/datamodel.graphql
index 9e2c32cc5..678aedbde 100644
--- a/basic/server/database/datamodel.graphql
+++ b/basic/server/database/datamodel.graphql
@@ -1,6 +1,6 @@
 type Post {
   id: ID! @unique
-  isPublished: Boolean! @default(value: false)
+  isPublished: Boolean! @default(value: "false")
   title: String!
   text: String!
-}
\ No newline at end of file
+}