diff --git a/Schemas/Collaboration/Topic/topic_GET.json b/Schemas/Collaboration/Topic/topic_GET.json
index 7ee7fd7..5d271fc 100644
--- a/Schemas/Collaboration/Topic/topic_GET.json
+++ b/Schemas/Collaboration/Topic/topic_GET.json
@@ -80,7 +80,7 @@
                 "$ref": "../RelatedTopic/related_topic_GET.json"
             }
         },
-        "main_viewpoint_guid": {
+        "default_viewpoint_guid": {
             "type": ["string", "null"]
         },
         "authorization": {
diff --git a/Schemas/Collaboration/Topic/topic_POST.json b/Schemas/Collaboration/Topic/topic_POST.json
index cb0e5a6..c4b8d7b 100644
--- a/Schemas/Collaboration/Topic/topic_POST.json
+++ b/Schemas/Collaboration/Topic/topic_POST.json
@@ -58,7 +58,7 @@
         "custom_fields": {
             "$ref": "custom_fields.json"
         },
-        "main_viewpoint_guid": {
+        "default_viewpoint_guid": {
             "type": ["string", "null"]
         }
     }
diff --git a/Schemas/Collaboration/Topic/topic_PUT.json b/Schemas/Collaboration/Topic/topic_PUT.json
index 125d2a7..39b9f00 100644
--- a/Schemas/Collaboration/Topic/topic_PUT.json
+++ b/Schemas/Collaboration/Topic/topic_PUT.json
@@ -54,7 +54,7 @@
         "custom_fields": {
             "$ref": "custom_fields.json"
         },
-        "main_viewpoint_guid": {
+        "default_viewpoint_guid": {
             "type": ["string", "null"]
         }
     }
diff --git a/swagger.yaml b/swagger.yaml
index 4a15337..bd59557 100644
--- a/swagger.yaml
+++ b/swagger.yaml
@@ -2280,6 +2280,9 @@ components:
               nullable: true
               items:
                 type: string
+        default_viewpoint_guid:
+          type: string
+          nullable: true
     topic_POST:
       type: object
       required:
@@ -2327,6 +2330,9 @@ components:
         due_date:
           type: string
           nullable: true
+        default_viewpoint_guid:
+          type: string
+          nullable: true
     topic_PUT:
       type: object
       required:
@@ -2371,6 +2377,9 @@ components:
         due_date:
           type: string
           nullable: true
+        default_viewpoint_guid:
+          type: string
+          nullable: true
     # viewpoint schemas
     bitmap_GET:
       type: object