diff --git a/apps/emqx/priv/bpapi.versions b/apps/emqx/priv/bpapi.versions
index 12fa9625e..91b01a4ee 100644
--- a/apps/emqx/priv/bpapi.versions
+++ b/apps/emqx/priv/bpapi.versions
@@ -13,6 +13,7 @@
 {emqx_conf,1}.
 {emqx_conf,2}.
 {emqx_conf,3}.
+{emqx_connector, 1}.
 {emqx_dashboard,1}.
 {emqx_delayed,1}.
 {emqx_delayed,2}.
diff --git a/apps/emqx_connector/src/emqx_connector_api.erl b/apps/emqx_connector/src/emqx_connector_api.erl
index f82e1741f..7b25ec204 100644
--- a/apps/emqx_connector/src/emqx_connector_api.erl
+++ b/apps/emqx_connector/src/emqx_connector_api.erl
@@ -744,7 +744,7 @@ do_bpapi_call(Node, Call, Args) ->
 do_bpapi_call_vsn(SupportedVersion, Call, Args) ->
     case lists:member(SupportedVersion, supported_versions(Call)) of
         true ->
-            apply(emqx_connector_proto_v4, Call, Args);
+            apply(emqx_connector_proto_v1, Call, Args);
         false ->
             {error, not_implemented}
     end.
@@ -754,9 +754,7 @@ maybe_unwrap({error, not_implemented}) ->
 maybe_unwrap(RpcMulticallResult) ->
     emqx_rpc:unwrap_erpc(RpcMulticallResult).
 
-supported_versions(start_connector_to_node) -> [2, 3, 4];
-supported_versions(start_connectors_to_all_nodes) -> [2, 3, 4];
-supported_versions(_Call) -> [1, 2, 3, 4].
+supported_versions(_Call) -> [1].
 
 redact(Term) ->
     emqx_utils:redact(Term).