diff --git a/CHANGES.md b/CHANGES.md
index e0ea6dd..79892a9 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,5 +1,11 @@
 # Changelog
 
+
+## v1.6.0
+
+* Added "member_state" parameter at the "acos.acos_slb_service_group_member" action
+  for setting registered member state.
+
 ## v1.5.0
 
 * Enabled to pass parameters how to connect ACOS appliance
diff --git a/actions/add_slb_service_group_member.yaml b/actions/add_slb_service_group_member.yaml
index aec6f86..7042e36 100644
--- a/actions/add_slb_service_group_member.yaml
+++ b/actions/add_slb_service_group_member.yaml
@@ -32,7 +32,14 @@ parameters:
         default: 80
     status:
         type: boolean
-        description: the status of taradd memmber to add
+        description: when 'True' is set, then statical data collection will be enabled
+        enum:
+          - True
+          - False
+        default: True
+    member_state:
+        type: boolean
+        description: when 'True' is set, then member service port will be enabled
         enum:
           - True
           - False