Can't canonicalize query :: caused by :: unknown operator: $maxDistance

[shiva6318]

when iam using mongdb-erlang query as
#{<<"$near">> => #{<<"$geometry">> => #{<<"type">> => <<"Point">>, <<"coordinates">> => [Long,Lat]}},<<"$maxDistance">> => 1000 }.
Iam getting error as Can't canonicalize query :: caused by :: unknown operator: $maxDistance .
if i use query without $maxDistance field then query is executed.
Can anyone help how to use $maxDistance in mongodb-erlang query.