diff --git a/apps/emqx/include/http_api.hrl b/apps/emqx/include/http_api.hrl
index 6a5cefec1..ba1438374 100644
--- a/apps/emqx/include/http_api.hrl
+++ b/apps/emqx/include/http_api.hrl
@@ -57,16 +57,16 @@
 -define(ERROR_CODES, [
     {?BAD_USERNAME_OR_PWD, <<"Bad username or password">>},
     {?BAD_API_KEY_OR_SECRET, <<"Bad API key or secret">>},
-    {'BAD_REQUEST', <<"Request parameters are not valid">>},
+    {'BAD_REQUEST', <<"Request parameters are invalid">>},
     {'NOT_MATCH', <<"Conditions are not matched">>},
     {'ALREADY_EXISTS', <<"Resource already existed">>},
-    {'BAD_CONFIG_SCHEMA', <<"Configuration data is not legal">>},
+    {'BAD_CONFIG_SCHEMA', <<"Configuration data is invalid">>},
     {'BAD_LISTENER_ID', <<"Bad listener ID">>},
     {'BAD_NODE_NAME', <<"Bad Node Name">>},
     {'BAD_RPC', <<"RPC Failed. Check the cluster status and the requested node status">>},
     {'BAD_TOPIC', <<"Topic syntax error, Topic needs to comply with the MQTT protocol standard">>},
     {'EXCEED_LIMIT', <<"Create resources that exceed the maximum limit or minimum limit">>},
-    {'INVALID_PARAMETER', <<"Request parameters is not legal and exceeds the boundary value">>},
+    {'INVALID_PARAMETER', <<"Request parameters is invalid and exceeds the boundary value">>},
     {'CONFLICT', <<"Conflicting request resources">>},
     {'NO_DEFAULT_VALUE', <<"Request parameters do not use default values">>},
     {'DEPENDENCY_EXISTS', <<"Resource is dependent by another resource">>},
diff --git a/apps/emqx_dashboard/test/emqx_dashboard_error_code_SUITE.erl b/apps/emqx_dashboard/test/emqx_dashboard_error_code_SUITE.erl
index c0a772d2d..588a69065 100644
--- a/apps/emqx_dashboard/test/emqx_dashboard_error_code_SUITE.erl
+++ b/apps/emqx_dashboard/test/emqx_dashboard_error_code_SUITE.erl
@@ -57,7 +57,7 @@ t_look_up_code(_) ->
 
 t_description_code(_) ->
     {error, not_found} = emqx_dashboard_error_code:description('_____NOT_EXIST_NAME'),
-    {ok, <<"Request parameters are not legal">>} =
+    {ok, <<"Request parameters are invalid">>} =
         emqx_dashboard_error_code:description('BAD_REQUEST'),
     ok.
 
@@ -79,7 +79,7 @@ t_api_code(_) ->
     Url = ?SERVER ++ "/error_codes/BAD_REQUEST",
     {ok, #{
         <<"code">> := <<"BAD_REQUEST">>,
-        <<"description">> := <<"Request parameters are not legal">>
+        <<"description">> := <<"Request parameters are invalid">>
     }} = request(Url),
     ok.