diff --git a/apps/emqx_management/src/emqx_mgmt_api_clients.erl b/apps/emqx_management/src/emqx_mgmt_api_clients.erl
index 539f38c6c..f078f4d2a 100644
--- a/apps/emqx_management/src/emqx_mgmt_api_clients.erl
+++ b/apps/emqx_management/src/emqx_mgmt_api_clients.erl
@@ -549,7 +549,7 @@ fields(keepalive) ->
     ];
 fields(subscribe) ->
     [
-        {topic, hoconsc:mk(binary(), #{desc => <<"Topic">>})},
+        {topic, hoconsc:mk(binary(), #{required => true, desc => <<"Topic">>})},
         {qos, hoconsc:mk(emqx_schema:qos(), #{default => 0, desc => <<"QoS">>})},
         {nl, hoconsc:mk(integer(), #{default => 0, desc => <<"No Local">>})},
         {rap, hoconsc:mk(integer(), #{default => 0, desc => <<"Retain as Published">>})},