diff --git a/content/concepts/did-ddo.md b/content/concepts/did-ddo.md
index 4e7e6725..1ec28db6 100644
--- a/content/concepts/did-ddo.md
+++ b/content/concepts/did-ddo.md
@@ -385,6 +385,7 @@ This section is auto-completed by aquarius.
 
 
 ## DDO Hash
+
 In order to ensure the integrity, a hash is computed for each DDO, following the next steps:
 
  - remove `event` object from root (if exists)
@@ -392,7 +393,8 @@ In order to ensure the integrity, a hash is computed for each DDO, following the
  - hash = sha256(JSON.stringify(DDO))
 
  The hash is used when publishing/update metadata using setMetaData function in ERC721 contract and it is stored in the event generated by the ERC721 contract:
- ```
+
+ ```solidity
  event MetadataCreated(
         address indexed createdBy,
         uint8 state,
@@ -420,7 +422,8 @@ Aquarius should always chech the hash after data is decrypted(provider api calle
 
 
 ## Full DDO Example:
-```
+
+```json
 {
   "@context": ["https://w3id.org/did/v1"],
   "id": "did:op:ACce67694eD2848dd683c651Dab7Af823b7dd123",