diff --git a/templates/definition/tariff/ostrom.yaml b/templates/definition/tariff/ostrom.yaml
index b573a534a..086c196c1 100644
--- a/templates/definition/tariff/ostrom.yaml
+++ b/templates/definition/tariff/ostrom.yaml
@@ -22,6 +22,6 @@ params:
       en: Only required if multiple contracts belong to the same user
 render: |
   type: ostrom
-  ClientId: {{ .clientid }}
-  ClientSecret: {{ .clientsecret }}
-  Contract: {{ .contract }}
+  clientid: {{ .clientid }}
+  clientsecret: {{ .clientsecret }}
+  contract: {{ .contract }}