diff --git a/apps/emqx_connector/src/emqx_connector_redis.erl b/apps/emqx_connector/src/emqx_connector_redis.erl
index e67de5643..0de7fc312 100644
--- a/apps/emqx_connector/src/emqx_connector_redis.erl
+++ b/apps/emqx_connector/src/emqx_connector_redis.erl
@@ -90,7 +90,6 @@ fields(sentinel) ->
         }},
         {sentinel, #{
             type => string(),
-            required => true,
             desc => ?DESC("sentinel_desc")
         }}
     ] ++
diff --git a/apps/emqx_gateway/src/emqx_gateway_api_listeners.erl b/apps/emqx_gateway/src/emqx_gateway_api_listeners.erl
index 0db5264b8..0f0ec8606 100644
--- a/apps/emqx_gateway/src/emqx_gateway_api_listeners.erl
+++ b/apps/emqx_gateway/src/emqx_gateway_api_listeners.erl
@@ -304,7 +304,8 @@ do_listeners_cluster_status(Listeners) ->
                 Id => #{
                     node => Node,
                     current_connections => Curr,
-                    max_connections => Max
+                    %% XXX: Since it is taken from raw-conf, it is possible a string
+                    max_connections => int(Max)
                 }
             }
         end,
@@ -312,6 +313,11 @@ do_listeners_cluster_status(Listeners) ->
         Listeners
     ).
 
+int(B) when is_binary(B) ->
+    binary_to_integer(B);
+int(I) when is_integer(I) ->
+    I.
+
 %%--------------------------------------------------------------------
 %% Swagger defines
 %%--------------------------------------------------------------------