diff --git a/apps/emqx/rebar.config b/apps/emqx/rebar.config
index 5a68f658e..3aa80c416 100644
--- a/apps/emqx/rebar.config
+++ b/apps/emqx/rebar.config
@@ -15,7 +15,6 @@
     , {esockd, {git, "https://github.com/emqx/esockd", {tag, "5.8.0"}}}
     , {ekka, {git, "https://github.com/emqx/ekka", {tag, "0.10.3"}}}
     , {gen_rpc, {git, "https://github.com/emqx/gen_rpc", {tag, "2.5.1"}}}
-    , {cuttlefish, {git, "https://github.com/emqx/cuttlefish", {tag, "v4.0.1"}}} %% todo delete when plugins use hocon
     , {hocon, {git, "https://github.com/emqx/hocon.git", {tag, "0.9.6"}}}
     , {pbkdf2, {git, "https://github.com/emqx/erlang-pbkdf2.git", {tag, "2.0.4"}}}
     , {recon, {git, "https://github.com/ferd/recon", {tag, "2.5.1"}}}
diff --git a/apps/emqx_rule_actions/src/emqx_bridge_mqtt_actions.erl b/apps/emqx_rule_actions/src/emqx_bridge_mqtt_actions.erl
index 80f51d2cc..d61706893 100644
--- a/apps/emqx_rule_actions/src/emqx_bridge_mqtt_actions.erl
+++ b/apps/emqx_rule_actions/src/emqx_bridge_mqtt_actions.erl
@@ -119,10 +119,9 @@
         },
         disk_cache => #{
             order => 8,
-            type => string,
+            type => boolean,
             required => false,
-            default => <<"off">>,
-            enum => [<<"on">>, <<"off">>],
+            default => false,
             title => #{en => <<"Disk Cache">>,
                        zh => <<"磁盘缓存"/utf8>>},
             description => #{en => <<"The flag which determines whether messages "
@@ -300,10 +299,9 @@
         },
         disk_cache => #{
             order => 6,
-            type => string,
+            type => boolean,
             required => false,
-            default => <<"off">>,
-            enum => [<<"on">>, <<"off">>],
+            default => false,
             title => #{en => <<"Disk Cache">>,
                        zh => <<"磁盘缓存"/utf8>>},
             description => #{en => <<"The flag which determines whether messages "
@@ -538,9 +536,9 @@ options(Options, PoolName, ResId) ->
     Address = Get(<<"address">>),
     [{max_inflight_batches, 32},
      {forward_mountpoint, str(Get(<<"mountpoint">>))},
-     {disk_cache, cuttlefish_flag:parse(str(GetD(<<"disk_cache">>, "off")))},
+     {disk_cache, GetD(<<"disk_cache">>, false)},
      {start_type, auto},
-     {reconnect_delay_ms, cuttlefish_duration:parse(str(Get(<<"reconnect_interval">>)), ms)},
+     {reconnect_delay_ms, hocon_postprocess:duration(str(Get(<<"reconnect_interval">>)))},
      {if_record_metrics, false},
      {pool_size, GetD(<<"pool_size">>, 1)},
      {pool_name, PoolName}
@@ -556,11 +554,11 @@ options(Options, PoolName, ResId) ->
                   {clientid, str(Get(<<"clientid">>))},
                   {append, Get(<<"append">>)},
                   {connect_module, emqx_bridge_mqtt},
-                  {keepalive, cuttlefish_duration:parse(str(Get(<<"keepalive">>)), s)},
+                  {keepalive, hocon_postprocess:duration(str(Get(<<"keepalive">>))) div 1000},
                   {username, str(Get(<<"username">>))},
                   {password, str(Get(<<"password">>))},
                   {proto_ver, mqtt_ver(Get(<<"proto_ver">>))},
-                  {retry_interval, cuttlefish_duration:parse(str(GetD(<<"retry_interval">>, "30s")), s)}
+                  {retry_interval, hocon_postprocess:duration(str(GetD(<<"retry_interval">>, "30s"))) div 1000}
                   | maybe_ssl(Options, Get(<<"ssl">>), ResId)]
          end.
 
diff --git a/apps/emqx_rule_actions/src/emqx_web_hook_actions.erl b/apps/emqx_rule_actions/src/emqx_web_hook_actions.erl
index 8bb1c7de0..ef21ab864 100644
--- a/apps/emqx_rule_actions/src/emqx_web_hook_actions.erl
+++ b/apps/emqx_rule_actions/src/emqx_web_hook_actions.erl
@@ -295,7 +295,7 @@ parse_action_params(Params = #{<<"url">> := URL}) ->
           path => merge_path(CommonPath, maps:get(<<"path">>, Params, <<>>)),
           headers => NHeaders,
           body => maps:get(<<"body">>, Params, <<>>),
-          request_timeout => cuttlefish_duration:parse(str(maps:get(<<"request_timeout">>, Params, <<"5s">>))),
+          request_timeout => hocon_postprocess:duration(str(maps:get(<<"request_timeout">>, Params, <<"5s">>))),
           pool => maps:get(<<"pool">>, Params)}
     catch _:_ ->
         throw({invalid_params, Params})
@@ -338,7 +338,7 @@ pool_opts(Params = #{<<"url">> := URL}, ResId) ->
            scheme := Scheme}} = emqx_http_lib:uri_parse(URL),
     PoolSize = maps:get(<<"pool_size">>, Params, 32),
     ConnectTimeout =
-        cuttlefish_duration:parse(str(maps:get(<<"connect_timeout">>, Params, <<"5s">>))),
+        hocon_postprocess:duration(str(maps:get(<<"connect_timeout">>, Params, <<"5s">>))),
     TransportOpts0 =
         case Scheme =:= https of
             true  -> [get_ssl_opts(Params, ResId)];
diff --git a/rebar.config b/rebar.config
index 4cad496d6..77e98ce68 100644
--- a/rebar.config
+++ b/rebar.config
@@ -50,7 +50,6 @@
     , {esockd, {git, "https://github.com/emqx/esockd", {tag, "5.8.0"}}}
     , {ekka, {git, "https://github.com/emqx/ekka", {tag, "0.10.3"}}}
     , {gen_rpc, {git, "https://github.com/emqx/gen_rpc", {tag, "2.5.1"}}}
-    , {cuttlefish, {git, "https://github.com/emqx/cuttlefish", {tag, "v4.0.1"}}} % TODO: delete when all apps moved to hocon
     , {minirest, {git, "https://github.com/emqx/minirest", {tag, "1.1.2"}}}
     , {ecpool, {git, "https://github.com/emqx/ecpool", {tag, "0.5.1"}}}
     , {replayq, {git, "https://github.com/emqx/replayq", {tag, "0.3.2"}}}
diff --git a/rebar.config.erl b/rebar.config.erl
index 258cd0bf3..ad07d50a3 100644
--- a/rebar.config.erl
+++ b/rebar.config.erl
@@ -261,7 +261,6 @@ relx_apps(ReleaseType) ->
     , inets
     , compiler
     , runtime_tools
-    , cuttlefish
     , emqx
     , {mnesia, load}
     , {ekka, load}