diff --git a/apisix/discovery/kubernetes/init.lua b/apisix/discovery/kubernetes/init.lua
index 3f5f275d9aff..d16d4f4fcd31 100644
--- a/apisix/discovery/kubernetes/init.lua
+++ b/apisix/discovery/kubernetes/init.lua
@@ -26,7 +26,7 @@ local error = error
 local pcall = pcall
 local setmetatable = setmetatable
 local is_http = ngx.config.subsystem == "http"
-local support_process, process = pcall(require, "ngx.process")
+local process = require("ngx.process")
 local core = require("apisix.core")
 local util = require("apisix.cli.util")
 local local_conf = require("apisix.core.config_local").local_conf()
@@ -520,11 +520,6 @@ end
 
 
 function _M.init_worker()
-    if not support_process then
-        core.log.error("kubernetes discovery not support in subsystem: ", ngx.config.subsystem,
-                       ", please check if your openresty version >= 1.19.9.1 or not")
-        return
-    end
     local discovery_conf = local_conf.discovery.kubernetes
     core.log.info("kubernetes discovery conf: ", core.json.delay_encode(discovery_conf))
     if #discovery_conf == 0 then
diff --git a/apisix/discovery/tars/init.lua b/apisix/discovery/tars/init.lua
index 14f658dce5d2..17bb2758b199 100644
--- a/apisix/discovery/tars/init.lua
+++ b/apisix/discovery/tars/init.lua
@@ -23,7 +23,7 @@ local local_conf = require("apisix.core.config_local").local_conf()
 local core = require("apisix.core")
 local mysql = require("resty.mysql")
 local is_http = ngx.config.subsystem == "http"
-local support_process, process = pcall(require, "ngx.process")
+local process = require("ngx.process")
 
 local endpoint_dict
 
@@ -343,12 +343,6 @@ local function get_endpoint_dict()
 end
 
 function _M.init_worker()
-    if not support_process then
-        core.log.error("tars discovery not support in subsystem: ", ngx.config.subsystem,
-                       ", please check if your openresty version >= 1.19.9.1 or not")
-        return
-    end
-
     endpoint_dict = get_endpoint_dict()
     if not endpoint_dict then
         error("failed to get lua_shared_dict: tars, please check your APISIX version")
diff --git a/docs/en/latest/discovery/kubernetes.md b/docs/en/latest/discovery/kubernetes.md
index 0735471b8145..fb11aac676d1 100644
--- a/docs/en/latest/discovery/kubernetes.md
+++ b/docs/en/latest/discovery/kubernetes.md
@@ -34,12 +34,6 @@ The [_Kubernetes_](https://kubernetes.io/) service discovery [_List-Watch_](http
 
 Discovery also provides a node query interface in accordance with the [_APISIX Discovery Specification_](../discovery.md).
 
-:::note
-
-use kubernetes discovery in L4 require OpenResty version >= 1.19.9.1
-
-:::
-
 ## How To Use
 
 Kubernetes service discovery both support single-cluster and multi-cluster modes, applicable to the case where the service is distributed in single or multiple Kubernetes clusters.
diff --git a/docs/zh/latest/discovery/kubernetes.md b/docs/zh/latest/discovery/kubernetes.md
index 0c390b785fce..c4b751889cf3 100644
--- a/docs/zh/latest/discovery/kubernetes.md
+++ b/docs/zh/latest/discovery/kubernetes.md
@@ -34,12 +34,6 @@ Kubernetes 服务发现以 [_List-Watch_](https://kubernetes.io/docs/reference/u
 
 同时遵循 [_APISIX Discovery 规范_](../discovery.md) 提供了节点查询接口。
 
-:::note
-
-在四层中使用 Kubernetes 服务发现要求 OpenResty 版本大于等于 1.19.9.1
-
-:::
-
 ## Kubernetes 服务发现的使用
 
 目前 Kubernetes 服务发现支持单集群和多集群模式，分别适用于待发现的服务分布在单个或多个 Kubernetes 的场景。