diff --git a/config/configuration.yml.example b/config/configuration.yml.example
index 823d8547..df3c5738 100644
--- a/config/configuration.yml.example
+++ b/config/configuration.yml.example
@@ -49,6 +49,8 @@ default: &default
     access_key_secret: '_Trustie_10010'
     domain: 'https://testgitea.trustie.net'
     base_url: '/api/v1'
+  blockchain:
+    api_url: "blockchain api url"
 
 
 production: