diff --git a/CHANGES.md b/CHANGES.md
index 0c1f3b5..ab3c1a4 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,8 +1,5 @@
 # Changelog
 
-## v1.9.0
-* Added an action (list_slb_http_templates) to show SLB http-template.
-
 ## v1.8.0
 * Enabled to set health_check parameter at the add_slb_server action.
 
diff --git a/actions/list_slb_http_templates_v21.yaml b/actions/list_slb_http_templates_v21.yaml
deleted file mode 100644
index 3bfe13b..0000000
--- a/actions/list_slb_http_templates_v21.yaml
+++ /dev/null
@@ -1,29 +0,0 @@
----
-name: list_slb_http_templates_v21
-runner_type: python-script
-description: lists HTTP Template entries which are registered in SLB
-enabled: true
-entry_point: ax_action_runner.py
-parameters:
-    action:
-        type: string
-        immutable: true
-        default: all
-    object_path:
-        type: string
-        immutable: true
-        default: slb.template.http_templates
-    name:
-        type: string
-        immutable: true
-        default: ''
-    one_target:
-        type: boolean
-        immutable: true
-        default: false
-    appliance:
-        type: string
-        description: The appliance information to connect, which is specified at the 'appliance' parameter in the configuration.
-    specified_target:
-        type: object
-        description: "Specify the target dynamically, (key: 'target', 'api_version', 'userid', 'passwd')"
diff --git a/pack.yaml b/pack.yaml
index f7d70e4..5edb998 100644
--- a/pack.yaml
+++ b/pack.yaml
@@ -7,7 +7,7 @@ keywords:
   - load balancer
   - ADC
   - network
-version: 1.9.0
+version: 1.8.0
 author: Hiroyasu OHYAMA
 email: user.localhost2000@gmail.com
 python_versions: