diff --git a/digifi_swagger.json b/digifi_swagger.json
index bd6f109..5dede04 100644
--- a/digifi_swagger.json
+++ b/digifi_swagger.json
@@ -2942,6 +2942,12 @@
         "in": "header",
         "name": "appID",
         "description": "API Key authentication method is implemented. Each request should contain appID and apiKey headers."
+      },
+      "apiKeySecret": {
+        "type": "apiKey",
+        "in": "header",
+        "name": "apiKey",
+        "description": "API Key Secret authentication method is implemented. Must be used together with appID."
       }
     }
   }