diff --git a/api-ref/source/parameters.yaml b/api-ref/source/parameters.yaml
index 2a0858f09a..824059dd4f 100644
--- a/api-ref/source/parameters.yaml
+++ b/api-ref/source/parameters.yaml
@@ -6046,11 +6046,17 @@ security_groups_obj:
   in: body
   required: true
   type: array
+security_groups_obj_optional:
+  description: |
+    One or more security groups objects.
+  in: body
+  required: false
+  type: array
 security_groups_obj_update_rebuild:
   description: |
     One or more security groups objects.
   in: body
-  required: true
+  required: false
   type: array
   min_version: 2.75
 security_groups_quota:
diff --git a/api-ref/source/servers.inc b/api-ref/source/servers.inc
index ced90e5304..8921e93eb7 100644
--- a/api-ref/source/servers.inc
+++ b/api-ref/source/servers.inc
@@ -634,8 +634,6 @@ Response
   - os-extended-volumes:volumes_attached.delete_on_termination: os-extended-volumes:volumes_attached.delete_on_termination
   - OS-SRV-USG:launched_at: OS-SRV-USG:launched_at
   - OS-SRV-USG:terminated_at: OS-SRV-USG:terminated_at
-  - security_groups: security_groups_obj
-  - security_group.name: name
   - status: server_status
   - tenant_id: tenant_id_body
   - updated: updated
@@ -646,6 +644,8 @@ Response
   - fault.message: fault_message
   - fault.details: fault_details
   - progress: progress
+  - security_groups: security_groups_obj_optional
+  - security_group.name: name
   - servers_links: servers_links
   - OS-EXT-SRV-ATTR:hostname: server_hostname
   - OS-EXT-SRV-ATTR:reservation_id: server_reservation_id
@@ -758,8 +758,6 @@ Response
   - os-extended-volumes:volumes_attached.delete_on_termination: os-extended-volumes:volumes_attached.delete_on_termination
   - OS-SRV-USG:launched_at: OS-SRV-USG:launched_at
   - OS-SRV-USG:terminated_at: OS-SRV-USG:terminated_at
-  - security_groups: security_groups_obj
-  - security_group.name: name
   - status: server_status
   - tenant_id: tenant_id_body
   - updated: updated
@@ -770,6 +768,8 @@ Response
   - fault.message: fault_message
   - fault.details: fault_details
   - progress: progress
+  - security_groups: security_groups_obj_optional
+  - security_group.name: name
   - OS-EXT-SRV-ATTR:hostname: server_hostname
   - OS-EXT-SRV-ATTR:reservation_id: server_reservation_id
   - OS-EXT-SRV-ATTR:launch_index: server_launch_index