diff --git a/core-concepts/did-ddo.md b/core-concepts/did-ddo.md
index 5fe3dd0f..bb144da5 100644
--- a/core-concepts/did-ddo.md
+++ b/core-concepts/did-ddo.md
@@ -258,7 +258,7 @@ Use GraphQL querys as datasource.
 {
   "type": "graphql",
 	"url": "http://172.15.0.15:8000/subgraphs/name/oceanprotocol/ocean-subgraph",
-  "query": """
+	"query": """
     	query{
             nfts(orderBy: createdTimestamp,orderDirection:desc){
                  id