diff --git a/api-ref/source/parameters.yaml b/api-ref/source/parameters.yaml
index 552d32615c..cb1070fcac 100644
--- a/api-ref/source/parameters.yaml
+++ b/api-ref/source/parameters.yaml
@@ -178,6 +178,7 @@ backup:
     Is the member a backup? Backup members only receive traffic when all
     non-backup members are down.
   in: body
+  min_version: 2.1
   required: true
   type: boolean
 backup-optional:
@@ -185,6 +186,7 @@ backup-optional:
     Is the member a backup? Backup members only receive traffic when all
     non-backup members are down.
   in: body
+  min_version: 2.1
   required: false
   type: boolean
 bytes_in:
@@ -441,6 +443,7 @@ image-id:
   description: |
     The ID of the glance image used for the amphora.
   in: body
+  min_version: 2.1
   required: true
   type: uuid
 insert_headers:
@@ -1015,6 +1018,7 @@ session_persistence_granularity:
     valid for UDP pools with session persistence of SOURCE_IP. Default netmask
     is 255.255.255.255, meaning per client full IP.
   in: body
+  min_version: 2.2
   required: false
   type: string
 session_persistence_timeout:
@@ -1023,6 +1027,7 @@ session_persistence_timeout:
     different member. Currently only applies to UDP pools with session
     persistence of SOURCE_IP. Default is 360.
   in: body
+  min_version: 2.2
   required: false
   type: integer
 session_persistence_type:
@@ -1081,36 +1086,42 @@ timeout_client_data:
   description: |
     Frontend client inactivity timeout in milliseconds. Default: 50000.
   in: body
+  min_version: 2.1
   required: true
   type: integer
 timeout_client_data-optional:
   description: |
     Frontend client inactivity timeout in milliseconds. Default: 50000.
   in: body
+  min_version: 2.1
   required: false
   type: integer
 timeout_member_connect:
   description: |
     Backend member connection timeout in milliseconds. Default: 5000.
   in: body
+  min_version: 2.1
   required: true
   type: integer
 timeout_member_connect-optional:
   description: |
     Backend member connection timeout in milliseconds. Default: 5000.
   in: body
+  min_version: 2.1
   required: false
   type: integer
 timeout_member_data:
   description: |
     Backend member inactivity timeout in milliseconds. Default: 50000.
   in: body
+  min_version: 2.1
   required: true
   type: integer
 timeout_member_data-optional:
   description: |
     Backend member inactivity timeout in milliseconds. Default: 50000.
   in: body
+  min_version: 2.1
   required: false
   type: integer
 timeout_tcp_inspect:
@@ -1118,6 +1129,7 @@ timeout_tcp_inspect:
     Time, in milliseconds, to wait for additional TCP packets for content
     inspection. Default: 0.
   in: body
+  min_version: 2.1
   required: true
   type: integer
 timeout_tcp_inspect-optional:
@@ -1125,6 +1137,7 @@ timeout_tcp_inspect-optional:
     Time, in milliseconds, to wait for additional TCP packets for content
     inspection. Default: 0.
   in: body
+  min_version: 2.1
   required: false
   type: integer
 total_connections:
diff --git a/api-ref/source/v2/listener.inc b/api-ref/source/v2/listener.inc
index 22e1dbc6be..2b08700aaa 100644
--- a/api-ref/source/v2/listener.inc
+++ b/api-ref/source/v2/listener.inc
@@ -181,6 +181,7 @@ Supported HTTP Header Insertions
 |                   |        | ``member``. HTTP for the HTTP listener         |
 |                   |        | protocol type, HTTPS for the TERMINATED_HTTPS  |
 |                   |        | listener protocol type.                        |
+|                   |        | **New in version 2.1**                         |
 +-------------------+--------+------------------------------------------------+
 
 Request Example