diff --git a/README.md b/README.md
index ac14658..cbbcdcf 100644
--- a/README.md
+++ b/README.md
@@ -808,5 +808,5 @@ Helpers
 Number of connections
 
 ```bash
-/opt/mtp_proxy/bin/mtp_proxy eval 'lists:sum([proplists:get_value(all_connections, L) || {_, L} <- ranch:info()]).'
+/opt/mtp_proxy/bin/mtp_proxy eval 'lists:sum([maps:get(all_connections, L) || {_, L} <- maps:to_list(ranch:info())]).'
 ```
diff --git a/src/mtp_metric.erl b/src/mtp_metric.erl
index 5fec7cb..0ea8aed 100644
--- a/src/mtp_metric.erl
+++ b/src/mtp_metric.erl
@@ -98,7 +98,7 @@ passive_metrics() ->
     |
     [{gauge, [?APP, connections, count],
       "Count of ranch connections",
-      [{#{listener => H}, proplists:get_value(all_connections, P)}
+      [{#{listener => H}, maps:get(all_connections, P)}
        || {H, P} <- mtproto_proxy_app:mtp_listeners()]}] ].
 
 -spec active_metrics() -> [{metric_type(), metric_name(), metric_doc(), Opts}]
diff --git a/src/mtproto_proxy_app.erl b/src/mtproto_proxy_app.erl
index 5102838..46b2dea 100644
--- a/src/mtproto_proxy_app.erl
+++ b/src/mtproto_proxy_app.erl
@@ -92,7 +92,7 @@ diff_env(NewEnv, OldEnv) ->
 
 
 %% @doc List of ranch listeners running mtproto_proxy
--spec mtp_listeners() -> [tuple()].
+-spec mtp_listeners() -> [{ranch:ref(), #{atom() => term()}}].
 mtp_listeners() ->
     maps:to_list(
       maps:filter(