diff --git a/apps/iot/src/influxdb/influx_client.erl b/apps/iot/src/influxdb/influx_client.erl
index 155e734..8fa7c30 100644
--- a/apps/iot/src/influxdb/influx_client.erl
+++ b/apps/iot/src/influxdb/influx_client.erl
@@ -137,7 +137,7 @@ handle_cast({write, Bucket, Org, Precision, Points}, State = #state{host = Host,
         query => Query
     }),
 
-    lager:debug("[influx_client] url is: ~p, headers: ~p, body: ~p", [Url, Headers, Body]),
+    lager:debug("[influx_client] url is: ~p, headers: ~p, body: ~ts", [Url, Headers, Body]),
     case hackney:request(post, Url, Headers, GZipBody, [{pool, influx_pool}]) of
         {ok, StatusCode, _RespHeaders, ClientRef} ->
             case StatusCode >= 200 andalso StatusCode < 300 of