diff --git a/apps/emqx_psk_file/.gitignore b/apps/emqx_psk_file/.gitignore
deleted file mode 100644
index 0379a99df..000000000
--- a/apps/emqx_psk_file/.gitignore
+++ /dev/null
@@ -1,16 +0,0 @@
-.eunit
-deps
-*.o
-*.beam
-*.plt
-erl_crash.dump
-ebin
-rel/example_project
-.concrete/DEV_MODE
-.rebar
-.erlang.mk/
-data/
-emqx_actorcloud_schema_parser.d
-.DS_Store
-_build
-rebar.lock
diff --git a/apps/emqx_psk_file/README.md b/apps/emqx_psk_file/README.md
deleted file mode 100644
index 3ba976b81..000000000
--- a/apps/emqx_psk_file/README.md
+++ /dev/null
@@ -1,2 +0,0 @@
-## EMQX TLS/DTLS PSK Plugin from file
-
diff --git a/apps/emqx_psk_file/etc/emqx_psk_file.conf b/apps/emqx_psk_file/etc/emqx_psk_file.conf
deleted file mode 100644
index 88c5bbdb1..000000000
--- a/apps/emqx_psk_file/etc/emqx_psk_file.conf
+++ /dev/null
@@ -1,2 +0,0 @@
-psk.file.path = "{{ platform_etc_dir }}/psk.txt"
-psk.file.delimiter = ":"
diff --git a/apps/emqx_psk_file/etc/psk.txt b/apps/emqx_psk_file/etc/psk.txt
deleted file mode 100644
index 3cf33d814..000000000
--- a/apps/emqx_psk_file/etc/psk.txt
+++ /dev/null
@@ -1,2 +0,0 @@
-client1:1234
-client2:abcd
diff --git a/apps/emqx_psk_file/priv/emqx_psk_file.schema b/apps/emqx_psk_file/priv/emqx_psk_file.schema
deleted file mode 100644
index 0c784d99b..000000000
--- a/apps/emqx_psk_file/priv/emqx_psk_file.schema
+++ /dev/null
@@ -1,10 +0,0 @@
-%%-*- mode: erlang -*-
-%% emqx_psk_file config mapping
-
-{mapping, "psk.file.path", "emqx_psk_file.path", [
-  {datatype, string}
-]}.
-
-{mapping, "psk.file.delimiter", "emqx_psk_file.delimiter", [
-  {datatype, string}
-]}.
\ No newline at end of file
diff --git a/apps/emqx_psk_file/rebar.config b/apps/emqx_psk_file/rebar.config
deleted file mode 100644
index 7ac3b98c8..000000000
--- a/apps/emqx_psk_file/rebar.config
+++ /dev/null
@@ -1,16 +0,0 @@
-{deps, []}.
-
-{edoc_opts, [{preprocess, true}]}.
-{erl_opts, [warn_unused_vars,
-            warn_shadow_vars,
-            warn_unused_import,
-            warn_obsolete_guard,
-            debug_info,
-            {parse_transform}]}.
-
-{xref_checks, [undefined_function_calls, undefined_functions,
-               locals_not_used, deprecated_function_calls,
-               warnings_as_errors, deprecated_functions]}.
-{cover_enabled, true}.
-{cover_opts, [verbose]}.
-{cover_export_enabled, true}.
diff --git a/apps/emqx_psk_file/src/emqx_psk_file.app.src b/apps/emqx_psk_file/src/emqx_psk_file.app.src
deleted file mode 100644
index ef18c8b69..000000000
--- a/apps/emqx_psk_file/src/emqx_psk_file.app.src
+++ /dev/null
@@ -1,14 +0,0 @@
-{application, emqx_psk_file,
- [{description,"EMQX PSK Plugin from File"},
-  {vsn, "4.3.1"}, % strict semver, bump manually!
-  {modules,[]},
-  {registered,[emqx_psk_file_sup]},
-  {applications,[kernel,stdlib]},
-  {mod,{emqx_psk_file_app,[]}},
-  {env, []},
-  {licenses, ["Apache-2.0"]},
-  {maintainers, ["EMQ X Team <contact@emqx.io>"]},
-  {links, [{"Homepage", "https://emqx.io/"},
-           {"Github", "https://github.com/emqx/emqx-psk-file"}
-          ]}
- ]}.
diff --git a/apps/emqx_psk_file/src/emqx_psk_file.appup.src b/apps/emqx_psk_file/src/emqx_psk_file.appup.src
deleted file mode 100644
index c34a3f71a..000000000
--- a/apps/emqx_psk_file/src/emqx_psk_file.appup.src
+++ /dev/null
@@ -1,13 +0,0 @@
-%% -*-: erlang -*-
-{VSN,
- [
-   {"4.3.0", [
-     {restart_application, emqx_psk_file}
-   ]}
- ],
- [
-   {"4.3.0", [
-     {restart_application, emqx_psk_file}
-   ]}
- ]
-}.
diff --git a/apps/emqx_psk_file/src/emqx_psk_file.erl b/apps/emqx_psk_file/src/emqx_psk_file.erl
deleted file mode 100644
index 3afd6dc73..000000000
--- a/apps/emqx_psk_file/src/emqx_psk_file.erl
+++ /dev/null
@@ -1,82 +0,0 @@
-%%--------------------------------------------------------------------
-%% Copyright (c) 2020-2021 EMQ Technologies Co., Ltd. All Rights Reserved.
-%%
-%% Licensed under the Apache License, Version 2.0 (the "License");
-%% you may not use this file except in compliance with the License.
-%% You may obtain a copy of the License at
-%%
-%%     http://www.apache.org/licenses/LICENSE-2.0
-%%
-%% Unless required by applicable law or agreed to in writing, software
-%% distributed under the License is distributed on an "AS IS" BASIS,
-%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-%% See the License for the specific language governing permissions and
-%% limitations under the License.
-%%--------------------------------------------------------------------
-
--module(emqx_psk_file).
-
--include_lib("emqx/include/emqx.hrl").
--include_lib("emqx/include/logger.hrl").
-
--import(proplists, [get_value/2]).
-
--export([load/1, unload/0]).
-
-%% Hooks functions
--export([on_psk_lookup/2]).
-
--define(TAB, ?MODULE).
--define(LF, 10).
-
--record(psk_entry, {psk_id :: binary(),
-                    psk_str :: binary()}).
-
-%% Called when the plugin application start
-load(Env) ->
-    _ = ets:new(?TAB, [set, named_table, {keypos, #psk_entry.psk_id}]),
-    {ok, PskFile} = file:open(get_value(path, Env), [read, raw, binary, read_ahead]),
-    preload_psks(PskFile, bin(get_value(delimiter, Env))),
-    _ = file:close(PskFile),
-    emqx:hook('tls_handshake.psk_lookup', {?MODULE, on_psk_lookup, []}).
-
-%% Called when the plugin application stop
-unload() ->
-    emqx:unhook('tls_handshake.psk_lookup', {?MODULE, on_psk_lookup}).
-
-on_psk_lookup(ClientPSKID, UserState) ->
-    case ets:lookup(?TAB, ClientPSKID) of
-        [#psk_entry{psk_str = PskStr}] ->
-            {stop, PskStr};
-        [] ->
-            {ok, UserState}
-    end.
-
-preload_psks(FileHandler, Delimiter) ->
-    case file:read_line(FileHandler) of
-        {ok, Line} ->
-            case binary:split(Line, Delimiter) of
-                [Key, Rem] ->
-                    ets:insert(?TAB, #psk_entry{psk_id = Key, psk_str = trim_lf(Rem)}),
-                    preload_psks(FileHandler, Delimiter);
-                [Line] ->
-                    ?LOG(warning, "[~p] - Invalid line: ~p, delimiter: ~p", [?MODULE, Line, Delimiter])
-            end;
-        eof ->
-            ?LOG(info, "[~p] - PSK file is preloaded", [?MODULE]);
-        {error, Reason} ->
-            ?LOG(error, "[~p] - Read lines from PSK file: ~p", [?MODULE, Reason])
-    end.
-
-bin(Str) when is_list(Str) -> list_to_binary(Str);
-bin(Bin) when is_binary(Bin) -> Bin.
-
-%% Trim the tailing LF
-trim_lf(<<>>) -> <<>>;
-trim_lf(Bin) ->
-    Size = byte_size(Bin),
-    case binary:at(Bin, Size-1) of
-        ?LF -> binary_part(Bin, 0, Size-1);
-        _ -> Bin
-    end.
-
diff --git a/apps/emqx_psk_file/src/emqx_psk_file_app.erl b/apps/emqx_psk_file/src/emqx_psk_file_app.erl
deleted file mode 100644
index 934ffe49e..000000000
--- a/apps/emqx_psk_file/src/emqx_psk_file_app.erl
+++ /dev/null
@@ -1,33 +0,0 @@
-%%--------------------------------------------------------------------
-%% Copyright (c) 2020-2021 EMQ Technologies Co., Ltd. All Rights Reserved.
-%%
-%% Licensed under the Apache License, Version 2.0 (the "License");
-%% you may not use this file except in compliance with the License.
-%% You may obtain a copy of the License at
-%%
-%%     http://www.apache.org/licenses/LICENSE-2.0
-%%
-%% Unless required by applicable law or agreed to in writing, software
-%% distributed under the License is distributed on an "AS IS" BASIS,
-%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-%% See the License for the specific language governing permissions and
-%% limitations under the License.
-%%--------------------------------------------------------------------
-
--module(emqx_psk_file_app).
-
--behaviour(application).
-
--emqx_plugin(?MODULE).
-
-%% Application callbacks
--export([start/2, stop/1]).
-
-start(_StartType, _StartArgs) ->
-    {ok, Sup} = emqx_psk_file_sup:start_link(),
-    _ = emqx_psk_file:load(
-        application:get_all_env(emqx_psk_file)),
-    {ok, Sup}.
-
-stop(_State) ->
-    emqx_psk_file:unload().
diff --git a/apps/emqx_psk_file/src/emqx_psk_file_sup.erl b/apps/emqx_psk_file/src/emqx_psk_file_sup.erl
deleted file mode 100644
index 041eecdb6..000000000
--- a/apps/emqx_psk_file/src/emqx_psk_file_sup.erl
+++ /dev/null
@@ -1,32 +0,0 @@
-%%--------------------------------------------------------------------
-%% Copyright (c) 2020-2021 EMQ Technologies Co., Ltd. All Rights Reserved.
-%%
-%% Licensed under the Apache License, Version 2.0 (the "License");
-%% you may not use this file except in compliance with the License.
-%% You may obtain a copy of the License at
-%%
-%%     http://www.apache.org/licenses/LICENSE-2.0
-%%
-%% Unless required by applicable law or agreed to in writing, software
-%% distributed under the License is distributed on an "AS IS" BASIS,
-%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-%% See the License for the specific language governing permissions and
-%% limitations under the License.
-%%--------------------------------------------------------------------
-
--module(emqx_psk_file_sup).
-
--behaviour(supervisor).
-
-%% API
--export([start_link/0]).
-
-%% Supervisor callbacks
--export([init/1]).
-
-start_link() ->
-    supervisor:start_link({local, ?MODULE}, ?MODULE, []).
-
-init([]) ->
-    {ok, { {one_for_one, 0, 1}, []} }.
-
diff --git a/apps/emqx_psk_file/test/emqx_psk_file_SUITE.erl b/apps/emqx_psk_file/test/emqx_psk_file_SUITE.erl
deleted file mode 100644
index d0083247d..000000000
--- a/apps/emqx_psk_file/test/emqx_psk_file_SUITE.erl
+++ /dev/null
@@ -1,24 +0,0 @@
-%%--------------------------------------------------------------------
-%% Copyright (c) 2020-2021 EMQ Technologies Co., Ltd. All Rights Reserved.
-%%
-%% Licensed under the Apache License, Version 2.0 (the "License");
-%% you may not use this file except in compliance with the License.
-%% You may obtain a copy of the License at
-%%
-%%     http://www.apache.org/licenses/LICENSE-2.0
-%%
-%% Unless required by applicable law or agreed to in writing, software
-%% distributed under the License is distributed on an "AS IS" BASIS,
-%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-%% See the License for the specific language governing permissions and
-%% limitations under the License.
-%%--------------------------------------------------------------------
-
--module(emqx_psk_file_SUITE).
--compile(nowarn_export_all).
--compile(export_all).
-
-all() -> [].
-
-groups() ->
-    [].
diff --git a/rebar.config.erl b/rebar.config.erl
index 5f00f87b2..14a8f93bc 100644
--- a/rebar.config.erl
+++ b/rebar.config.erl
@@ -297,7 +297,6 @@ relx_plugin_apps_per_rel(cloud) ->
     , emqx_exhook
     , emqx_exproto
     , emqx_prometheus
-    , emqx_psk_file
     ];
 relx_plugin_apps_per_rel(edge) ->
     [].
@@ -355,7 +354,6 @@ etc_overlay(ReleaseType) ->
 
 extra_overlay(cloud) ->
     [ {copy,"{{base_dir}}/lib/emqx_lwm2m/lwm2m_xml","etc/"}
-    , {copy, "{{base_dir}}/lib/emqx_psk_file/etc/psk.txt", "etc/psk.txt"}
     ];
 extra_overlay(edge) ->
     [].
diff --git a/scripts/inject-deps.escript b/scripts/inject-deps.escript
index 0b6371342..8100c3959 100755
--- a/scripts/inject-deps.escript
+++ b/scripts/inject-deps.escript
@@ -44,7 +44,6 @@ edge_excludes() ->
     , emqx_exhook
     , emqx_exproto
     , emqx_prometheus
-    , emqx_psk_file
     ].
 
 base_deps() ->