diff --git a/apps/emqx_authn/src/emqx_authn_api.erl b/apps/emqx_authn/src/emqx_authn_api.erl
index 6627e935a..ee8757774 100644
--- a/apps/emqx_authn/src/emqx_authn_api.erl
+++ b/apps/emqx_authn/src/emqx_authn_api.erl
@@ -1006,10 +1006,11 @@ update_authenticator(ConfKeyPath, ChainName, AuthenticatorID, Config) ->
         )
     of
         {ok, #{
-            post_config_update := #{emqx_authentication := #{id := _ID}},
-            raw_config := _AuthenticatorsConfig
+            post_config_update := #{emqx_authentication := #{id := ID}},
+            raw_config := AuthenticatorsConfig
         }} ->
-            {204};
+            {ok, AuthenticatorConfig} = find_config(ID, AuthenticatorsConfig),
+            {200, maps:put(id, ID, convert_certs(fill_defaults(AuthenticatorConfig)))};
         {error, {_PrePostConfigUpdate, emqx_authentication, Reason}} ->
             serialize_error(Reason);
         {error, Reason} ->
diff --git a/apps/emqx_authn/test/emqx_authn_api_SUITE.erl b/apps/emqx_authn/test/emqx_authn_api_SUITE.erl
index 466aaddbe..a1047e25c 100644
--- a/apps/emqx_authn/test/emqx_authn_api_SUITE.erl
+++ b/apps/emqx_authn/test/emqx_authn_api_SUITE.erl
@@ -22,6 +22,7 @@
 
 -include("emqx_authn.hrl").
 -include_lib("eunit/include/eunit.hrl").
+-include_lib("common_test/include/ct.hrl").
 
 -define(TCP_DEFAULT, 'tcp:default').
 
@@ -41,7 +42,7 @@ groups() ->
 init_per_testcase(t_authenticator_fail, Config) ->
     meck:expect(emqx_authn_proto_v1, lookup_from_all_nodes, 3, [{error, {exception, badarg}}]),
     init_per_testcase(default, Config);
-init_per_testcase(_Case, Config) ->
+init_per_testcase(_, Config) ->
     {ok, _} = emqx_cluster_rpc:start_link(node(), emqx_cluster_rpc, 1000),
     emqx_authn_test_lib:delete_authenticators(
         [?CONF_NS_ATOM],
@@ -212,7 +213,7 @@ test_authenticators(PathPrefix) ->
         method => <<"get">>,
         headers => #{<<"content-type">> => <<"application/json">>}
     },
-    {ok, 204, _} = request(
+    {ok, 200, _} = request(
         put,
         uri(PathPrefix ++ [?CONF_NS, "password_based:http"]),
         ValidConfig1
@@ -301,14 +302,14 @@ test_authenticator(PathPrefix) ->
         method => <<"get">>,
         headers => #{<<"content-type">> => <<"application/json">>}
     },
-    {ok, 204, _} = request(
+    {ok, 200, _} = request(
         put,
         uri(PathPrefix ++ [?CONF_NS, "password_based:http"]),
         ValidConfig1
     ),
 
     ValidConfig2 = ValidConfig0#{pool_size => 9},
-    {ok, 204, _} = request(
+    {ok, 200, _} = request(
         put,
         uri(PathPrefix ++ [?CONF_NS, "password_based:http"]),
         ValidConfig2
diff --git a/apps/emqx_authn/test/emqx_authn_jwt_SUITE.erl b/apps/emqx_authn/test/emqx_authn_jwt_SUITE.erl
index 547f173d5..e84f87f0b 100644
--- a/apps/emqx_authn/test/emqx_authn_jwt_SUITE.erl
+++ b/apps/emqx_authn/test/emqx_authn_jwt_SUITE.erl
@@ -448,7 +448,7 @@ t_jwt_not_allow_empty_claim_name(_) ->
     ),
 
     ?assertMatch(
-        {204},
+        {200, _},
         emqx_authn_api:authenticator(
             put, #{
                 bindings => #{id => <<"jwt">>},
diff --git a/changes/v5.0.12-en.md b/changes/v5.0.12-en.md
index 0b6a6feed..9baaa9d75 100644
--- a/changes/v5.0.12-en.md
+++ b/changes/v5.0.12-en.md
@@ -14,8 +14,6 @@
 - Refactor authn API by replacing `POST /authentication/{id}/move` with `PUT /authentication/{id}/position/{position}`. [#9419](https://github.com/emqx/emqx/pull/9419).
   Same is done for `/listeners/{listener_id}/authentication/id/...`.
 
-- Return `204` instead of `200` for `PUT /authenticator/:id` [#9434](https://github.com/emqx/emqx/pull/9434/).
-
 ## Bug fixes
 
 - Fix that the obsolete SSL files aren't deleted after the ExHook config update [#9432](https://github.com/emqx/emqx/pull/9432).
diff --git a/changes/v5.0.12-zh.md b/changes/v5.0.12-zh.md
index cde03f3d8..82c2796c4 100644
--- a/changes/v5.0.12-zh.md
+++ b/changes/v5.0.12-zh.md
@@ -4,8 +4,6 @@
 
 - 通过 `node.global_gc_interval = disabled` 来禁用全局垃圾回收 [#9418](https://github.com/emqx/emqx/pull/9418)。
 
-- 现在，`PUT /authenticator/:id` 将会返回 204 而不再是 200 [#9434](https://github.com/emqx/emqx/pull/9434/)。
-
 - 优化命令行实现, 避免输入错误指令时, 产生不必要的原子表消耗 [#9416](https://github.com/emqx/emqx/pull/9416)。
 
 - 支持在 Apple Silicon 架构下编译苹果系统的发行版本 [#9423](https://github.com/emqx/emqx/pull/9423)。