diff --git a/apps/emqx_connector/src/emqx_connector_redis.erl b/apps/emqx_connector/src/emqx_connector_redis.erl
index f70093c4e..67310dbac 100644
--- a/apps/emqx_connector/src/emqx_connector_redis.erl
+++ b/apps/emqx_connector/src/emqx_connector_redis.erl
@@ -90,6 +90,7 @@ fields(sentinel) ->
         }},
         {sentinel, #{
             type => string(),
+            required => true,
             desc => ?DESC("sentinel_desc")
         }}
     ] ++